You have often __1__ people talk about work. Perhaps you have __2__ your friends about how hard you worked to get something done. However, you may have done no work __3_ you think you worked hard.
A boy is pushing a big box very hard, but the box is __4__ heavy for him to move and he may __5__ to push against the box. __6__ the language of science, he has not done __7__ work. Can you think you are working when you are studying or talking?
In science, work is only done when a force(力) moves something that has weight through a distance（距离）.
Work =" force" × distance moved.
__8_ you want to find out whether work is done, _9_ yourself, “Is a push or a pull moving something through a distance?” If your answer is __10_, then work is being done.
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动词填空
1.The teacher seems ________ (know) everything about it. We’d better tell her ourselves.
2.The keyboard is used in many ways, including _______ (type).
3.If he _______ (not be) busy tomorrow, he’ll phone you.
4.Floods _______ (wash) away thousands of houses in China every year.
5.There _______ (be) a football match in our school this weekend, isn’t there?
6.Can’t you see the boy _________ (lie) on the grass? Yes.
7.______ Sandy ______ (practice) the piano from 7:00 to 8:00 last night?
8.While we were having lunch, it _______ (start) to rain.
9.We’d better _______ (not climb) the tall tree. It’s too dangerous.
10.I won’t see the film tonight because I ________ (see) it twice.
--What are you going to do this Sunday?
--___________. What about you?
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A．I’m OK |
B．I’m sorry |
C．I’ve no idea |
D．What a pity |
He __________ be at home now because I saw him in the office just now.
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A．can’t |
B．mustn’t |
C．may |
D．must |
--Mary, where’s Simon? I haven’t seen him for days.
--He __________ Japan. This may be the third time he _________ there.
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A．has been to, has gone to |
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B．has been to, has gone |
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C．has gone to, has been to |
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D．has gone to, has been |
--I called you yesterday evening, but there was no answer.
--Oh, I’m sorry I __________in the shopping mall.
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A．shop |
B．shopped |
C．was shopping |
D．have shopped |
