It's said that __________ is going to give us a lecture.
| A．a famous young American | B．an American famous young |
| C．a famous American young | D．a young famous American |
There’s no way of knowing why one man makes an important discovery________another man，also intelligent，fails.
| A．since | B．if |
| C．as | D．while |
I have heard a lot of good things about you________I came back from abroad.
| A．since | B．until |
| C．before | D．when |
She says that she’ll have to close the shop________business improves.
| A．if | B．unless |
| C．after | D．when |
He is so busy.He cannot afford enough time with his son________he wants to.
| A．even if | B．as if |
| C．because | D．before |
The manager wants to see changes in the company，and I am sure he will________.
| A．in particular | B．in turn |
| C．in charge | D．in time |