Question

【题目】用所给动词或词组的适当形式填空
（1）Don't (talk) in the library.
（2）We must (obey) the school rules and the traffic rules. They're good for our safety(安全).
（3）—Can they (eat) in the classroom?
—No, they can't.
（4）Some students have to (wear) glasses in class because they can't see the blackboard clearly.
（5）We (not have to) go to school on May Day（五一节）according to（根据）the law(法律)．

Answer 1

【答案】
（1）talk
（2）obey
（3）eat
（4）wear
（5）don't have to
【解析】
（1）助动词don't后面加动词原形。
（2）情态动词must后加动词原形。
（3）情态动词can后加动词原形。
（4）have to后加动词原形。
（5）含有实义动词的一般现在时的否定句要借助助动词do或does,we作主语，助动词用do。