用列数字作比较的句子:英语??

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29.1The most important thing ______ we should consider is the first idea _____ he has mentioned in the speech.
A. which, that B. that, which
C. which, which D. that, that
原因

D

被修饰的词为最高级或序数词时,定语从句的先行词只能用that

b

D

D
因为thing由the most修饰,idea由the first修饰。

再进一步看,在定语从句中,如果可以用which,自然也可以用that。只有在非限定性定语从句中的which才不能被that代替。