题目内容
19.All the preparations for the travel ________,and we're ready to start.( )A. | completed | B. | complete | ||
C. | has been completed | D. | have been completed |
分析 所有为旅游做的准备都完成了,我们就准备出发了.
解答 答案是D.考查被动语态,根据句意:我们就准备出发了,可见到目前为止所有的准备都已经完成,判断应该用现在完成时,preparation与动词complete之间是被动关系,preparations是复数名词,所以答案选D.
点评 被动语态由"助动词be+及物动词的过去分词"构成.被动语态的时态变化只改变be的形式,过去分词部分不变.疑问式和否定式的变化也如此.掌握各种时态的被动语态是解题的关键.
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