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2. We walked for a long time. Let’s ________a rest.

    A. stop having        B. stop to have        C. having           D. to stop to have

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1. -Must I hand in my homework today?

-No, you ________. Tomorrow is OK.

    A. mustn’t           B. wouldn’t          C. can’t            D. needn’t

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5. 你在过马路之前,必须要先左右看看。

    You have to ________________before you cross the road.

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4. 遵守交通规则是非常重要的。

    ________________ the traffic rules.

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3. 15路公交车在10分钟前准时进站。

    The No. 15 bus ________________ 10 minutes ago.

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2. 如果你现在要出去,最好随身带着雨伞。

    ________________, ________________ an umbrella with you.

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1. 如果明天不下雨,我们就去爬长城。

    ________________. We will go to the Great Wall.

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  1. May I use a ________ if I get lost in the forest.

  2. The boy is going ________with his cousin if it is sunny tomorrow.

  3. Riding on the roadway is not ________.

  4. When you ride on the roadway, it is important to ________the traffic rules.

  5. You should walk your bike across the ________and in school.

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4. 不允许某人做某事时,可以说You can’t do sth. 或者Don’t do sth. (参见第12册Unit 10的Grammar Notes)。语气再强一点可以用Never do sth.或者You mustn’t do sth. 例如:

    You mustn’t swim in the river. 你千万不要在河里游泳。

    You mustn’t smoke here. 禁止在此处吸烟。

    Never be late again. 千万不要再迟到了。

    Never put your head, arms, or feet out of the bus windows. 千万不要把头、胳膊或脚伸出车窗外。

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3. 要求某人做某事时,可以用You must do sth. 或Remember to do sth.结构。例如:

    You must obey the traffic rules. 你必须遵守交通规则。

    Remember to ride your scooter on the sidewalk. 记住在人行道上骑单脚滑行车。

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