3. 兰兰,你不能总是看电视。(all the time)

2. 每天参加晨练能增强你的体质。(build up)

1. 我认为你应该和你的父母谈谈。(talk with)

(   ) 5. ―The meeting is starting. I'm afraid we        leave now.

      —OK. Let's go.

   A. must   B. have to   C. can   D. may

(   ) 4. ―How should we fight the flu?

―We should do more        and change clothes often.

   A. exercises   B. exercise

   C. practice   D. homework

(   ) 3. You'd better wash your hands before meals       you healthy.

   A. keep   B. kept

   C. keeping   D. to keep

(   ) 2. ―Must I take part in the activity?

―No,you         . You're too young.

   A. mustn't   B. don't

   C. don't have to   D. don't need

(   ) 1. ―May I use your bike,Jim? ―Sure,          

   A. go ahead. B. you can ask Bill.

   C. you can't. D. that's all right.

5. We should do our best to p        all kinds of diseases.

4. ―Excuse me,where is Miss Hu,Liu Ming? I have some q        to ask her.

―She is in the office.