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. /

　　【答案及解析】答案選 B。it 是形式賓語，that從句是真正的賓語。

　　2. I don't think ________ possible to master a foreign language without much memory work.

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

　　【答案及解析】答案選 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

　　【答案及解析】答案選 A。強(qiáng)調(diào)句

　　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 whe

　　【答案及解析】答案選 D。no sonner than=as soon as 一……就……, scarcely when=as soon as, hardly when=as soon as

　　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

　　【答案及解析】答案選 D。not until 直到……才

　　6. It was ______ who arrived there first ， despite our detour（繞路）。

　　A. us        B. we          C. our          D. ours

　　【答案及解析】答案選 B。

　　7. It was _______ the next morning that Kunta began to think about where he was going.

　　A. after     B. before       C. when         D. not until

　　【答案及解析】答案選 D。after 在……之后, before 在……之前, when 當(dāng)……時(shí)候, not until 直到……才　　8. It was _______ he got a map that he started on his away.

　　A. until      B. till            C. not until       D. not till

　　【答案及解析】答案選 C。until 直到, till 直到, not until 直到……才