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

A. as                 B. when           C. since             D. that

【解析】D。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。

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

A. that               B. it              C. himself          D. him

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

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

A. it                 B. that            C. one           D. which

【解析】C。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。

61.I can’t answer for ________ that the boy is honest.

A. it                 B. me            C. which            D. them

【解析】A it为形式宾语，真正的宾语是空格后that引导的宾语从句.

60. Will you see to _______ that the luggage is brought back as soon as possible?

A. me                B. yourself        C. it              D. them

【解析】C it为形式宾语，真正的宾语是空格后that引导的宾语从句，类似以上 see to 用法的短语还有 depend on, answer for 等。

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

A. it                  B. me           C. yourself           D. them

【解析】A。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。

58. “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

【解析】A。但容易误选B。it 和 one 的区别可简单地概括为：it = the + 名词，one = a + 名词。

57. 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

【解析】D。要防止误选A或C。it 用以指身份不明的人。若指身份明确的人，则不宜用it。

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

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

【解析】C。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。

55. 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

【解析】D但很容易误选B，认为两空均考查形式主语。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。请做以下类似试题：