Question

The reason ____ their failure you know is _____ they didn’t get fully prepared for the experiment.

A．why; that

B．that; why

C．for; that

D．why; because

Answer 1

C

试题分析：考查介词及表语从句。“the reason for… is that…”是一个固定搭配。意为：．．．的原因是什么，for修饰the reason，that引导的表语从句，句意：他们失败的原因是他们没有充分准备好实验。因为the  reason后面不是定语从句，不能用why。选Ｃ。
点评：这里的介词和表语从句，都取决于reason的搭配，reason和for搭配，意思是：…的原因，而cause也是原因，但是和of搭配，还有考生会用because引导表语从句，实际是受到汉语的影响。