1. Everyone knows that _______ is dangerous to play with fire, but _______ is difficult is to prevent children from playing with fire.

　　A. it, it B. what, what

　　C. it, what D. what, it

　　2. I dislike _______ when others laugh at me in public or think poorly of me behind.

　　A. that B. those

　　C. it D. them

　　3. I’ve no idea. I just pretended nobody was at home, so I didn’t ask who _______ was.

　　A. he B. that

　　C. she D. it

　　4. “Excuse me, I want to have my watch fixed, but I can’t find a repair shop.” “I know ________ nearby. Come on, I’ll show you.”

　　A. one B. it

　　C. some D. that

　　5. Will you see to _______ that my children are taken good care of while I am away?

　　A. it B. me

　　C. yourself D. them

　　6. Why shouldn’t I buy a new coat — I haven’t bought _____ for five years.

　　A. it B. that

　　C. one D. which

　　7. He made _____ known to his friends that he didn’t want to enter politics.

　　A. that B. it

　　C. himself D. him

　　8. It used to be thought _____ the Earth was flat.

　　A. as B. when

　　C. since D. that

　　9. The Parkers bought a new house but ______ will need a lot of work before they can move in.

　　A. they B. it

　　C. one D. which

　　10. _______ is well known _______ Hong Kong returned to China on July 1st, 1997.

　　A. It, that B. As, /

　　C. As, as D. It, which

　　【答案解析】

　　1.选C

　　【解析】第一空填形式主语，真正的主语是其后的不定式to play with fire。第二空填what，what is difficult 是主语从句，注意what is difficult 后的谓语动词is。故选C。

　　2.选C

　　【解析】因为在通常情况下，like 是及物动词，其后应有宾语(句中it 即为其宾语)。句中的when 从句不是宾语从句，而是时间状语从句，其中的when 的意思是“当……的时候”。其实，也有的词典将I don’t like it when (if) … 作为一个句型来处理。能这样用的动词不多，主要的有enjoy, like, dislike, love, hate, prefer, appreciate等表示喜好的动词。故选C。

　　3.选D

　　【解析】it 用以指身份不明的人。若指身份明确的人，则不宜用it。故选D。

　　4.选A

　　【解析】it 和one 的区别可简单地概括为：it = the + 名词，one = a + 名词。如：I haven’t got any pens, and I want to borrow one. 我没有钢笔，我想借一支。(one = a pen)故选A。

　　5.选A

　　【解析】it 为形式宾语，真正的宾语是空格后that引导的宾语从句。see to 意为“负责”、“注意”，其中的to 为介词，不宜直接跟that引导的宾语从句，遇此情况可借助代词it。故选A。

　　6.选C

　　【解析】one 指a coat。比较：it = the +名词，one = a+名词，换句话说，it 是特指的，而one 则是泛指的。故选C。

　　7.选B

　　【解析】it 为形式宾语，真正的宾语是that he didn’t want to enter politics。故选B。

　　8.选D

　　【解析】it 为形式主语，此句为People used to think that the Earth was flat 的被动语态形式。故选D。

　　9.选B

　　【解析】it 指前面提到的new house。注意不能选D，因为其前有并列连词but。故选B。

　　10.选A

　　【解析】it 为形式主语，其后的that从句为主语从句。故选A。
 

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