( ) the people have become masters of their own country ( ) science can really the people.A .it is only then\that.B.it was that\when.C .it is only when \that.D.it was when\then.如何选,为什么?
问题描述：
( ) the people have become masters of their own country ( ) science can really the people.
A .it is only then\that.B.it was that\when.C .it is only when \that.D.it was when\then.如何选,为什么?
答
选c
it is only when ....that...用来加强语气
只有...的时候，....才...
答
c,it is(only when) that 可看作是只有什么什么的时候才能发生什么什么事when 引导时间状语only只有，only when只有在那时，it is that强调句型，在这个句子中强调的是只有在这个时间，你把it is that去掉句子成立可判断出是强调句了science can…people when the ……own country.明白了吗
答
选c,首先分析这个句子的含义,大概是“只有当人民成为自己国家的主人时,科学才能真正为人民服务”,你在really后面漏掉了一个类似serve的动词,那么据此判断when应该在第一个分句的前面,排除ab选项,然后是c跟d的选择,It is ... that ...是固定的强调句式,强调的是is之后的内容,即第一个分句,和句子的含义吻合,因此选c.