A. which I think is B. which I think it is
C. which I think it D. I think which is
分析:这是一个非限制性定语从句, which 在从句中作主语,代替 the discovery .做这类题目的方法是先将插入语 I think 去掉,然后再将句子还原成为 He made another wonderful discovery, which is of great importance to science. 问题就迎刃而解了。正确答案: A .
( 2 ) In fact ______ is a hard job for the police to keep order in an important football match. (上海 2001 )
A. this B. that
C. there D. it
分析: in fact 在句中实际担当插入语,只不过没用逗号隔开,意思是实际上,对警察来说在一次重大的足球比赛中,维持秩序是一项困难的工作。空格容易把句子当成 fact 的同位语从句而误选 B .正确答案: D
( 3 )- Alice, you feed the birds today, _____?
- But I fed it yesterday. (广东 1999 )
A. do you B. will you
C. didn't you D. don't you
分析:这是特设语境,插入语 Alice 暗示后面句子为带主语的祈使句,正确答案: B .
( 4 ) Who do you think _______ us a talk this afternoon?
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