20. His sister left home in 1998, and______since.
| A．had not been heard of | B．has not been heard of |
| C．had not heard of | D．has not heard of |
— Ten dollars, please! — How terrible! I ______ to bring my wallet with me.
| A．was forgetting | B．forgot | C．had forgotten | D．am forgetting |
. — Is the man our sales-manager? — No, it ______ not be him. He never plays cards.
| A．must | B．can | C．will | D．may |
--- My parents said that we would take a camping on May Day. ----_____ it rains then?
| A．What if | B．What about | C．What for | D．So what |
--- Guess what! I came across my deskmate of middle school at the party last Sunday.
--- ____ I’m sure you had a wonderful time.
| A．With pleasure | B．Very well | C．How nice | D．All right |
Although it is not our normal _____ to give credit, this time I think we should consider the matter more closely.
| A．state | B．intention | C．occasion | D．practice |