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外语
More and more advanced farm machines_____, the agricultural production increase tremendously.
More and more advanced farm machines_____, the agricultural production increase tremendously.
admin
2012-06-19
70
问题
More and more advanced farm machines_____, the agricultural production increase tremendously.
选项
A、using
B、having used
C、having been used
D、to have been used
答案
C
解析
本句的原因状语采用现在分词表示独立主格结构,由于主句和从句的主语不一致,故在作状语的现在分词之前加了其逻辑主语more and more advanced farm machines:从时间上看,产量的提高发生在使用先进的机械之后,所以需要用完成时,而且必须构成被动语态才能够阐述所要表达的意思。
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0
专业英语四级
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