问题 选择题

.______ he can finish his task on time is of great importance.

A.Whenever

B.If

C.Whether

D.Whichever

答案

答案:C

题目分析:本题考查主语从句。B项if作为“是否”讲只能引导动词之后的宾语从句,因而排除;A,D两项与题意不合。如选A项,原题可改为“…is of no importance”。故答案为C.

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