题目内容
Rick has learned a lot about Chinese culture _____ he came to China.
| A．before | B．when | C．until | D．since |
D
解析试题分析：句意：Rick自从来到中国了解了许多有关中国的文化。A.before“在…之前”；B.when“当…时候”；C.until“直到…时候才”；D.since“自从”。本句时态是现在完成时，since从句用于现在完成时中。结合语境，故选D。
考点：考查连词的辨析。
名校课堂系列答案Some physics problems in this book are _________difficult for the students _________work out.
| A．so; that | B．not; but |
| C．such; that | D．too; to |
．Hurry up, ________ you’ll not catch the first bus.
| A．and | B．or | C．but | D．if |
Practice more, ________ you’ll do better in playing chess.
| A．but | B．and | C．when | D．after |
---My sister Sally had a bad cold. __________, she went to work as usual.
---She should go to see a doctor.
| A．Though | B．Although |
| C．Because | D．However |
_____ he was very tired, he continued working in his office.
| A．Since | B．Although | C．As soon as | D．Because |
In American, a friend inviting you to a restaurant doesn't mean that he or she will pay for the meal ______ you are told ahead.
| A．until | B．unless | C．although | D．if |
—May I go swimming this afternoon?
— I'm afraid not _______ you have finished your homework.
| A．if | B．unless | C．because | D．but |
—It’s too late. I have to go now.
—Oh, it’s raining outside. Don’t leave it stops.
| A．while | B．if | C．until | D．after |