Question

The question _______ we can get enough coal for the winter has not been cleared up yet .

A．that

B．if

C．which

D．whether

Answer 1

D

考查名词性从句。本题考查同位语从句，解释说明the question，不可用if。句意：冬天我们是否有足够的煤，这个问题还不明晰。