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
5.一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
答案与解析:
1. C.因为not.. util..的强调结构是: it be not until.. th...(肯定)。也不要用倒装，故选C。顺便说说，也可用not unti1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脆hat三个词去掉，句子(有时要调整顺序)然正确，就是强调结构，否则就不是。
3. B.强调时间状语从句。
4.B。强调的是主语。
5.B。对强调结构的一般问句的回答，若是过去式用Yes, it was.或No, it wasn't.
