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.withoutfriendsthemostdifficultchallengeforChucwithoutfriendsthemostdifficultchallengeforChuckwhilelivingontheisland.A.Howdoeshesurvive...areB.Howtosurvive...areC.

题目详情
. _________without friends ___________ the most difficult challenge for Chuc
_________without friends ___________ the most difficult challenge for Chuck while living on the island. A. How does he survive ... are B. How to survive ... are C. How does he survive ... is D. How to survive ... is
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答案和解析
D. 此句主语为_________without friends ,为不定式作主语(前面加了关系副词),单个非谓语动词作主语,谓语用单数.
A,C;首先排除,主语从句用陈述句