题目内容
【题目】Every possible means __________ to save the wounded soldier up to now.
A. was tried B. were tried
C. have been tried D. has been tried
【答案】D
【解析】句意:到目前为止,为救伤员各种可能的方法都已经用上了。means方法,手段,单复数相同,every means为单数,谓语动词用单数;另外,up to now迄今为止,用于现在完成时
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