20. I got up early this morning, but I ________ so because I was not on duty today.
| A．mustn’t have done | B．needn’t have done |
| C．didn’t need to do | D．can’t have done |
. They can't be working now. It's time they ________ the office.
| A．have left | B．would leave | C．could leave | D．left |
_____ ,she is the sort of woman to spread sunshine to people through her smile.
| A．Shy and cautious | B．Sensitive and thoughtful |
| C．Honest and confident | D．Light-hearted and optimistic |
—I hear your favourite star Jack Chou has already left.
—Oh, no!__________.
| A．That’s ok | B．I was looking forward to seeing him. |
| C．Forget it | D．It doesn’t matter |
Mark, Mrs. White . Would you please drive her to the airport?
| A．leaves | B．has left | C．left | D．is leaving |
Little about his own safety though he was in great danger.
| A．he cared | B．he had cared | C．did he care | D．had he cared |