英语常用的强调结构是"It is (was)+被强调部分(主语、宾语或状语)+who (that)..."。一般说来,被强调部分指人时,用who;指事物时用that,但that也可以指人。在美国英语中指事物时常用which来代替that。

　　Beneath each of the following sentences, there are four choices marked A, B, C and D. Choose the one that best completes the sentence.

　　201. It is the uses to which television is put＿＿＿＿ determine its value to society.

　　A. they 　B. those　C. that　D. who

　　202. It was not until he entered the classroom＿＿＿＿ he realized that he had forgotten to do the homework.

　　A. before　B. when 　C. then 　D. that

　　203. It was Isadora Duncan who＿＿＿＿ responsible for many of the innovations that have made modern dance different from classical ballet.

　　A. is 　B. was 　C. has been 　D. were

　　204. It is only when you nearly lose someone＿＿＿＿ fully conscious of how much you value him.

　　A. do you become 　B. then you become

　　C. that you become 　D. have you become

　　205. More often it is the President,＿＿＿＿ and not the members of his cabinet, to the populace.

　　A. which appeal　B. that appeal

　　C. who appeal　D. who appeals

　　206. We were told that it was in that very room＿＿＿＿ the Republicans held the important meeting.

　　A. where　 B. there　C. in which　D. that

　　207. It is during his spare time＿＿＿＿ Tom has been studying the situation for several months.

　　A. which　B. that　C. when　D. then

　　208. It is the news＿＿＿＿ most parents of the hope that there is a safe and socially approved road to a kind of life they themselves have not had, but their children can.

　　A. that deprive　B. that it deprives

　　C. that deprives　D. when it deprives

　　209. It is the business of the scientist to accumulate knowledge about the universe and all＿＿＿＿ in it, and to find, if he is able, common factors which account for the facts that he knows.

　　A. who are　B. which are　C. who is　D. that is

　　210. It is the decline of active play and, I suppose, the enormous growth of purely receptive entertainment＿＿＿＿ rise to a sociological interest in the problem.

　　A. which had given　B. that gave

　　C. that has given　D. that have given

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