1. People have proved _________ to be true that the heat we get from coal and oil comes from the sun.

A. that B. it C. this D. /

it 是形式宾语，that从句是真正的宾语。

答案 B

2. I dont think ________ possible to master a foreign language without much memory work.

A. it B. that C. this D. those

答案 A

3. “Were all three people in the car injured in the accident?”

“No， ______ only the two passengers who got hurt.”

A. it was B. there is C. it were D. there was

强调句

答案 A

4. __________ he realized it was too late to return home.

A. No sooner it grew dark than B. Hardly it grew dark when

C. It was not until dark that D. Scarcely it grew dark when

no sonner than=as soon as 一……就……

scarcely when=as soon as

hardly when=as soon as

答案 C

5. It was not until she arrived in class ________ realized she had forgotten her book.

A. and B. when she C. she D. that she

not until 直到……才

答案 D