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

試題分析：考查介詞及表語從句。“the reason for… is that…”是一個固定搭配。意為：．．．的原因是什么，for修飾the reason，that引導的表語從句，句意：他們失敗的原因是他們沒有充分準備好實驗。因為the  reason后面不是定語從句，不能用why。選Ｃ。
點評：這里的介詞和表語從句，都取決于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，還有考生會用because引導表語從句，實際是受到漢語的影響。