that 子句時態怎麼看。

現在完成進行式，簡單地說，就是「過去到現在還一直持續進行中」。

以下這些時間副詞與「現在完成式」連用，凡表示「經驗」、「過去到現在」、「已經、剛剛」的時間副詞都與現在完成式連用。

if = 假如，條件副詞子句，不加 will

題目：

頻率副詞 = 次數多寡

1. accustomed to    習慣於（+N / V-ing）：

I am accustomed to staying up late. 我習慣晚睡。

      John Maynard Keynes used the phrase “animal spirits” in 1936 to __16__ the role confidence plays in the economy. He saw how investors and businesspeople must go with their guts in uncertain times and put their money to work if the economy is to grow and the nation to __17__ . Judging by recent surge in the stock market, animal spirits are certainly back on Wall Street. Investors, __18__ by worries a bubble may be building, have piled into equities, pushing the Standard & Poor’s 500-stock index up about 60% into March. The __19__ looks to be lifting. That should give legs to the recovery and reduce the risk of a __20__ into recession next year as stepped-up business spending offsets the fading impact of the $787 billion federal stimulus plan.

Research shows that people with good friends have better physical and emotional health than those who have only a weak network of friends or no real friends at all. There are three general types of support friends to be __41__. First and probably most important, friends give us emotional support: they show us __42__ someone cares; someone really likes us and wants to be with us. But friends also provide guidance. When we have important __43__ to make, friends can be a sounding-board for our ideas, and they can present other sides to a problem. Friends also provide __44__, tangible support: they loan us their car when ours breaks down, they cook and meal for us when we’re sick, or they pick up our mail when we’re on vacation. Psychologists believe that friends __45__ as a coping mechanism. By providing us with companionship and support, friends serve as a buffer against the stress in our lives.

      More than any other region, Asia is the place where the family-business model reigns supreme. In 2004, the magazine FinanceAsia calculated that __41__ controlled 40 of the region’s 100 largest listed companies, while states controlled 38, and just 22 were widely held corporations per the norm in New York or London. Yet while this __42__ has underpinnings both culturally and historically, Asia isn’t that different from the rest of the world—just __43__ in its economic takeoff. The 19th- century empires built by. U.S. industrialists like Andrew Carnegie and John D. Rockefeller were largely dissolved in the 20th, and the same fate appears to __44__ many of Asia’s postwar tycoons in the 21st. __45__ a Chinese axiom holds, “Wealth does not span three generations.” This pattern will hold because of all the pressure on family rule.

      Traditionally, Americans and Asians have had very different ideas about love and marriage. Americans believe in “romantic” marriage – a boy and girl are attracted to each other, fall in love, and decide to marry each other. Asians, __21__ , believe in contractual marriage – the parents of the bride and groom decide on the marriage, __22__terms of the agreement; the bride and groom may never meet __23__ their wedding day; and love – __24__ it ever develops – is supposed to follow marriage, not precede it. Generation after generation of Asian men and women have entered matrimony __25__ the more business-like arrangements of the marriage contract.

      Why do we dream? Nobody knows, but everybody __21__. We dream during REM (rapid eye movement) sleep. In eight hours of sleep, people usually have four REM periods. But we __22__ very little. We usually remember only 20 or 30 seconds of REM sleep. There are many ideas about dreams. Some psychologists believe we dream because we need a safe way to do things we can't do where we're __23__ . Some think we dream in order to work out our problems. __24__ believe dreams don't have any special meaning. They are simply thoughts that come to us when we __25__. Whatever you believe, dreams prove one thing—some people have wonderful imaginations.

      Apples are the second most valuable fruit crop in the United States, after oranges. Autumn is a time when fresh apples are everywhere. They are __41__ native to the country. Research shows that apples came from Central Asia. But __42__ believed to have been grown in America since the early sixteen hundreds. Washington State, in the Pacific Northwest, produces the country’s biggest apple crop. New York and Michigan are also big __43__ . Among nations, China is the biggest grower, __44__ by the United States and Turkey. This year, American growers expect to __45__ nearly four thousand five hundred million kilograms of apples. That is a little less than last year’s record harvest.

      What are the requirements of a good learners’ dictionary? __41__ , it should include the right information, the information should be easy to find and —once __42__ — it should be easy to understand and easy to use. Ensuring that we cover the “right” information calls, first, __43__ careful analysis of all the available linguistic data. A large and diverse corpus is an essential basis for this operation, __44__ it is only the starting point. Intelligent data-extraction software enables __45__ to get maximum value from the corpus, and our editorial team has benefited from a collaboration with University of Brighton’s Information Technology Research Institute.

      Recently we asked for your opinions about paying students to improve school attendance or performance on tests. Some American __41__ are doing this. But more of you were against the idea than were __42__ it. Some people said paying students sends a message that __43__ is the only valuable reward. Steven from China says students should study for knowledge. Money may improve performance in the short term, he says, but we should think about the __44__. Zhao Jing Tao, a college student in China, thought of an old saying. __45__ students is like "drinking poison to end thirst" -- trying to solve a problem without considering the effects.

      When the first baby arrives in a household, everything changes. __41__, the parents needed an alarm clock in the morning, but now the baby decides when they should wake up. Formerly, the parents __42__, but now all their free time is spent admiring their infant. __43__ pre-baby days, their life is more carefully planned. While they used __44__ to see friends whenever they wanted to, that is no longer possible. If they want to go out without the baby, they must arrange for a babysitter. __45__ the neat and tidy rooms of the past, these days their apartment is full of baby things. Their friends have even noticed a difference in the topic of conversation: It’s always about the baby.

      Earth has warmed by about 1ºF over the past 100 years. But why? And __1__ ? Well, scientists are not exactly sure. The Earth could be getting warmer on its own, __2__ many of the world’s leading climate scientists think that things people do are helping to make the Earth warmer. Global warming refers to an average increase in the Earth’s temperature, __3__ in turn causes changes in climate. A __4__ Earth may lead to changes in rainfall patterns, a rise in sea level, and a wide range of impacts on plants, wildlife, and humans. When scientists talk about the issue of climate change, their __5__ is about global warming caused by human activities. It is because they are sure about the danger of the green houseeffect.

      In many western cultures, people believe that “seven” is a lucky number, but in Chinese communities around the world, “eight” is considered the most fortuitous of numbers, __16__ it much coveted for addresses, phone numbers and bank accounts. Number “eight” sounds very similar __17__ the Chinese word for “being rich and having a lot of money”. The Chinese feel that “eight” portends not only prosperity __18_____ confidence and money worth even millions. Most Chinese also try their very best to __19__ numbers which make them think of things that have bad luck. For __20__ , some Chinese do not like the number “four” because it sounds like the Chinese word for “death”. The number eight doesn't have the same appeal to the Japanese or Koreans—whose cultures have been influenced by the Chinese—but all three cultures are united in their avoidance of the number four.

      Sitting in front of the television may be relaxing, but spending too much time in front of the tube may take years off your life. That's what Australian researchers found when they collected TV __16__ information from more than 11,000 people older than 25 years. The __17__ found that people who watched an average six hours of TV a day lived an average 4.8 years less than those who didn't watch any television. Also, every hour of TV that participants watched after age 25 was associated with a 22-minute __18__ in their life expectancy. It's no mystery that sitting in front of the tube isn't exactly __19__ . The more TV you watch, the less physically active you are. And the less exercise you get, the more likely you are to develop __20__ such as diabetes or heart problems. Moreover, the poor diet that onscreen junk-food advertising promotes worsens the problems.

      Kids who live in northern U. S. states are used to having class canceled every now and then because of snow. But on Monday, a number of schools across the Northeast closed their doors __16__ a different reason: dangerously cold outdoor temperatures. Throughout the region, temperatures __17__ below zero. Schools canceled classes or delayed openings to protect students from the __18__ . The wind chill made it feel __19__ cold as 25 to 30 degrees below zero. The weathermen issued warnings about the __20__ of staying outside in the cold for too long. The cold was expected to last until Thursday.