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问题: 一道深圳调研的单选

_______ the Tsunami(海啸)______has caused about 170,000 deaths so far broke out at the end of 2004 came as a great shock to the whole world.
A. That; which B. What; that
C. That; what D. Which; That
看看这个选哪个?各位高手!

解答:

答案选A
这个句子考察了that引导的名词性从句作主语, 还考察了which引导的定语从句修饰海啸Tsunami,所以我们可以把句子分解开来:
Tsunami broke out at the end of 2004应该在整个句子里作主语,但是主语只能是名词或者动名词或者不定式,所以因为是完整的句子,要变成主语的话,用that作为引导词,引导名词性从句,作为整个句子得主语,that 不能省略。
我们可以暂时用Tsunami 来代替,所以这个句子就可以简化:Tsunami came as a great shock
to the whole world .简化句子可以分析出句子结构,这样可以根据所缺少的来选择。有Tsunami----has caused about 170000 deaths so far,我们可以看出句子缺少主语,所以 Tsunami做主语,用which 来代指