1. It worried her a hit _______ her hair was turning grey.
A. while B. that C. if D. for
2. You will be late _________ you leave immediately.
A. unless B. until C. if D. or
答：B．It为形式主语，that从句为真正主语。
3. _________ the days went on, the weather got worse.
A. With B. Since C. While D. As
答：D． As the days went on. 随着时间一天天地过去。
4. We must get up early tomorrow, _______ we’ll miss the first bus to the Great Wall.
A. so B. or C. but D. however
答：B。or否则，要不然的话。
5. I didn’t manage to do it _______ you had explained how.
A. until B. unless
C. when D. before
答：A．unless相当于if...not 若选B项，主句应用虚拟句式 I wouldn’t have managed to do it if you had not explained how。项与句意不符．根据主句与从句的时态可排除D项。
6. ________he comes, we won’t be able to go.
A. Without B. Unless
C. Except D. Even
答：B。A和c项均为介词，D项为副词，从词性上即可判断出答．另外，从句意上unless最佳，表示“除非，如果不……”。
7. I hurried _________ I wouldn’t be late for class.
A. since B. so that
C. as if D. unless
答：B．sothat引导的是目的状语从句。
8. Although he is considered a great writer, ______.
A. his works are not widely read
B. but his works are not widely read
C. however his works are not widely read
D. still his works are not widely read
答：A．although不能与but，however等词连用．但可和still连用，D项中still的位置应放在are之后：his works are still not widely read.
9. —What was the party like?
—Wonderful. It’s years _______ I enjoyed myself so much.
A. after B. before C. when D. since
答：D。It十时间+since... (since从句谓语用过去式)；h was+时间+since... (since从句谓语用过去完成式)。
10. —I don’t like chicken _______fish.
— 1 don’t like chicken, _______ I like fish very much.
A. and, and B. and, but
C. or, and D. or, but
答：D。 or一般用于否定句中表示并列，and用于肯定句中表示并列，从题干中可看出答语和上一句持不同意见，故用but。