the question is it is worth doing

The question is ______ it is worth doing.(  ) A. if B. which C. whether D. what
2024-12-20 15:51:16
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回答1:

答案:C
分析句意可知,______ it is worth doing是一个表语从句,从句中缺少是否.但是if 不能用来引导表语从句.