1. —How time flies! Since the College Entrance Examinations are approaching, we have to seize every minute.

—      _. As the saying goes, time lost cannot be won again.

A. Don’t mention it          B. Forget it

C. Exactly                          D. I beg to differ

2. According to the school rule, no child   _be allowed out of the school, unless accompanied by his or her parents.

A. should      B. shall            C. must             D. can