He traveled to many mountain villages and saw many poor children out of school. This experience his life.
| A．would change | B．had changed | C．was to change | D．was changing |
—I’m sorry, but we can’t find your purse in our restaurant.
—________ I seem to lose something every time I eat out.
| A．How come? | B．Come on! |
| C．Bad luck! | D．Pardon me? |
—Hi, Mary! Do you know where Jim is?
— I think he ________ a lecture in the library.
| A．will deliver | B．is delivering |
| C．has delivered | D．delivered |
— Are you sure you won’t come for a drink with us?
—_____, if you insist.
| A．All right then | B．It depends |
| C．Not at all | D．I don’t care |
They must have been enjoying themselves there, or they _____ so long.
| A．can’t have stayed | B．wouldn’t have stayed |
| C．needn’t have stayed | D．couldn’t stay |
_____ and you will break the world record.
| A．If you make more efforts | B．Making more efforts |
| C．More efforts | D．When making more efforts |