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The road is covered with snow.I Can’t understand _______ they insist on going by motorbike.?
A.whyB.whether?C.whenD.how?
A?
本题考查宾语从句的引导词。根据语句的意义,选A项比较恰当。句意为“路面上满是雪,我不明白他们为什么坚持骑摩托车呢”。
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