题目内容

I work out the problem at first, but after my teacher showed me an example, I get the answer easily.

A.
couldn’t; was able to
B.
can’t; could
C.
wasn’t able to; could
D.
was able to; was able to

A
试题分析：句意:起初我不能做出那个问题，但是在老师给我做了例子后，我就很容易地得到了答案。can作情态动词的基本意思是“能,能够”“可以”“可能,会”,可表示体力、智力能够完成一件事情或环境赋予的能力; 也可表示由于环境或其他因素而产生的可能性,只有现在时和过去时两种形式,，它可表示不一定能够做完一件事；而be able to则有多种时态形式。有能力做，并且做完了事情。故选A。
考点：考查情态动词的用法。
点评：本题难度适中。情态动词是近几年高考的热点，本题在于考查考生be able to 和can /could的区别及不同的用法的掌握情况。
即学即练：The fire spread through the hotel very quickly but everyone _______ get out.
A. had to B. would C. could D. was able to
解析:D。句意:表示过去具体某次“能够”做成某事只能用 was / were able to 而不用could。

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相关题目

I ________ work out the problem at first, but after my teacher showed me an example, I ________ get the answer easily.

A．couldn’t; was able to	B．can’t; could
C．wasn’t able to; could	D．was able to; was able to

短文改错（共10小题，每小题1分，满分10分）注意答题规范
Many people find exams frightened experiences. Sit down for an exam when
everyone is so quiet and serious really makes people nervous. In order to overcome
that, I always do few things to relax after I start. At the beginning of the exam, I
read out all the directions carefully so that I can know exactly how I have to do.
Then I work out how many time I can spend on each question and make sure I keep
to my timetable. If I feel myself getting nervous at any time, I will stop what I was
doing and take a few deep breath. However, I think the most important thing is to
review my work thoroughly before exams. The better I’m prepared, the more
worried I will be in exams.

短文改错（共10小题，每小题1分，满分10分）注意答题规范

Many people find exams frightened experiences. Sit down for an exam when

everyone is so quiet and serious really makes people nervous. In order to overcome

that, I always do few things to relax after I start. At the beginning of the exam, I

read out all the directions carefully so that I can know exactly how I have to do.

Then I work out how many time I can spend on each question and make sure I keep

to my timetable. If I feel myself getting nervous at any time, I will stop what I was

doing and take a few deep breath. However, I think the most important thing is to

review my work thoroughly before exams. The better I’m prepared, the more

worried I will be in exams.

One of the most widely accepted, commonly repeated assumptions (假设) in our culture is that if you exercise, you will lose weight. I exercise all the time, but I still have gut fat that hangs over my belt when I sit. Why isn’t all the exercise getting rid of it?

It’s a question many of us could ask. More than 45 million Americans now belong to a health club, up from 23 million in 1993. We spend some $19 billion a year on gym memberships. Of course, some people join and never go. Still, as one major study — the Minnesota Heart Survey — found, more of us at least say we exercise regularly.

And yet obesity (肥胖) figures have risen sharply in the same period: a third of Americans are obese, and another third count as overweight by the Federal Government’s definition. Yes, it’s entirely possible that those of us who regularly go to the gym would weigh even more if we exercised less. But like many other people, I get hungry after I exercise, so I often eat more on the days I work out than on the days I don’t. Could exercise actually be keeping me from losing weight?

The popular belief that exercise is essential for weight control is actually fairly new. As recently as the 1960s, doctors routinely advised against too much exercise, particularly for older adults who could injure themselves. Today doctors encourage even their oldest patients to exercise, which is sound advice for many reasons: People who regularly exercise are at significantly lower risk for all manner of diseases — those of the heart in particular. They less often develop cancer and many other illnesses. But the past few years of obesity research show that the role of exercise in weight loss has been wildly over-evaluated.

“In general, for weight loss, exercise is pretty useless,” says Eric Ravussin, exercise researcher at Louisiana State University. Many recent studies have found that exercise isn’t as important in helping people lose weight as you hear so regularly in gym advertisements or on shows like The Biggest Loser — or, for that matter, from magazines like this one.

The basic problem is that while it’s true that exercise burns calories and that you must burn calories to lose weight, exercise has another effect: it can make one hungry. That causes us to eat more, which in turn can negate (使无效) the weight-loss benefits we just gained. Exercise, in other words, isn’t necessarily helping us lose weight. It may even be making it harder.

1. From the passage we learn that ____.

A. some Americans join a health club but never go there

B. the number of overweight people has doubled since 1993

C. more than 45 million Americans now go to the gym regularly

D. Americans waste too much money each year on sports

2. According to the passage, exercise ____.

A. has long been believed to be good for older adults

B. is not properly advertised as an effective way to lose weight

C. was first recognized as an effective way to lose weight in the 1960s

D. is less effective in preventing heart disease than what doctors believe

3.According to the writer, people might gain weight because ____.

A. they have the habit of going to the gym regularly

B. they eat the same food when they do not exercise

C. they exercise less than required by doctors

D. they eat more after they exercise

4.What may be the best title for this passage?

A. Overweight Is Not Good for Your Health

B. Exercise Won’t Make You Thin

C. Gym Is Part of American Lifestyle

D. Obesity Is a Social Problem in America

One of the most widely accepted, commonly repeated assumptions (假设) in our culture is that if you exercise, you will lose weight. I exercise all the time, but I still have got fat that hangs over my belt when I sit. Why isn’t all the exercise getting rid of it?