—Don’t __________ at your parents. It’s impolite (不礼貌的).
—Sorry, I will not.
| A．shout | B．shouting |
| C．shouts | D．shouted |
You _____ __ wash your hands before meals. It is good for your health.
A. must B. can C. have to
— May I ask you some questions?
— ______________
A. Yes, he may. B. Sure, go ahead. C. Of course not.
You’d better _______ too much meat. You are much too fat.
A. not eat B. don’t eat C. not to eat
We should take care ________ ourselves.
A. to B. for C. of
—What’s wrong with you? —Don’t worry. It’s ________.
A. nothing serious
B. serious nothing
C. serious something