单项填空
1. — Mr Smith, may I ask for a few days off? I am worn out.
— . We are as busy as a bee.
A. Don’t mention B. Forget it C. No ,you can’t D. Sure, go ahead
2. How time flies !It is in one and a half years we will leave this school.
A. until B. before C. when. D. that
3. You have lost your temper at that time .After all ,she is only a child .
A. shouldn’t B. can’t C. may not D. mustn’t
4. Many little children suffer from kidney stone and the disease is reported by the milk powder they eat.
A. to cause B. to be caused C. causing D. being caused
