1. Is_3 hours_the boy who lives next to you to finish his homework?
A. it; that
B. it; that it takes
C. it for; it takes
D. it; when
2. Suppose you had a million pounds- how would you spend_?
A. them
B. it
C. one
D. that
3._suddenly occurred to me_he had been to America before.
A. It; that
B. That; that
C. This; that
D. There; which
4. - Who is playing basketball on the playground?
_the boys in class 3.
A. There are
B. They are
C. That is
D. It is
5. His mother kept warning him not to drive after drink, but_didn't help.
A. she
B. he
C. it D. which
6. In order to keep healthy, I make_. a rule to take a walk in the moming.
A. it
B. that
C. this
D. such
[答案与解析]
1.B。此题看似复杂，首先去掉who引导的定语从句，还原成陈述句，可以看出，实际就是It takes+ sb. some time + to do sth句式。强调的
时间，用It is +被强调的时间(3 hours) + that+其余部分(it takes the boy to finish his homework)。第二空的it作形式宾语，真正的主语是后面的
不定式。句意为“你隔壁那孩子花费了三个小时完成作业吗?”
2. B。it指代前面出现的名词a million pounds,看作一-个整体，因此答案为B。句意为“假如你有一百万英镑一你怎么花呢? ”
3.A。此题考查it作形式主语，代替后面that主语从句。句意为“我忽然想起来他以前去过美国。”
4. D.此句中it指成为说话问题或话题之对象的人或事物。如: Who is that noise?Itisacat.那闹声是什么?那是一只猫。
5.C。it指代前面一句话。句意为“他妈妈一直警告他不要酒后驾驶，但就是毫无效果。”
6.A。i也可作形式宾语,而真正的宾语(不定式或从句)置于句尾。句意为“为了健康，我自己规定清晨散步。”又如: You'll find it diff
icult to learn written Chinese你会发现汉语文字很难学。
