1. It was ________back home after the experiments.
A. not until midnight did he go B. until midnight that he didn’t go
C. not until midnight that he went D. until midnight when he didn’t go
6. It was with great joy ________he received the news that his lost daughter had been found.
A. because B. which C. since D. that
2. It was about 600 years ago ________ the first clock with a face and an hour hand was made.
A. that B. until C. before D. when
3. It was only when I reread his poems recently ________ I began to appreciate their beauty.
A. until B. that C. then D. so
4. It is the ability to do the work ________ matters not where you come from or what you are.
A. one B. that C. what D. it
5. ―Wasn’t it Dr. Wang who spoke to you just now?
―________.
A. I didn’t know he was B. Yes, it was
C. No, he wasn’t D. Yes, he did
6. Was ________ that I saw last night at the concert?
A. it you B. not you C. you D. that yourself
7. It was ________ he said ________ disappointed me.
A. what; that B. that; that C. what; what D. that; what
8. It is these poisonous products ________ can cause the symptoms of the flu, such as headache and aching muscles.
A. who B. that C. how D. what
9. It was how the young man had learned five foreign languages ________ attracted the audience’s interest.
A. so that B. that C. what D. in which
10. It was for this reason ________ her uncle moved out of
A. which B. why C. that D. how
答案与解析：
1. C. 因为not…until…的强调结构是：it be not until…that…(肯定)。也不要用倒装，故选C。顺便说说，也可用not until开头来强调，此时要倒装，请比较：Not until midnight did he went back…。
6. D. 被强调成为 with great joy。news后的that从句为同位语从句。
2. A。该句强调时间状语。判断是否是强调结构的方法是：将 it is