More and more advanced farm machines_____, the agricultural production increase tremendously.

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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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专业英语四级

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More and more advanced farm machines_____, the agricultural production increase tremendously.

专业英语四级

Mostofusthinkweknowthekindofkidwhobecomesakiller,andmostofthetimewe’reright.Boys【C1】______about85%ofal

Thestudentsfailedtomeetthenecessary______foradmissiontothecourse.

Theystoodgazingatthehappy______ofchildrenplayinginthepark.

Somepeoplebelievethatinternationalsportcreatesgoodwillbetweenthenations.Theythinkthatifcountriesplaygamestoget

Henryreadtheletteragainlesthe______anythingimportant.

Sociologistsuse"power"torefertothecapacityofpeopletocontrolorinfluencetheactionsofothers.Sociologistsstudypo

Manypeoplebelievetheglarefromsnowcausessnowblindness.Yet,darkglassesornot,theyfindthemselves【C1】______headaches

Whathadthewomanbeentryingtodoearlier?

TheWesthasbeguntotakemorenoticeoftheEast.Thefifth【C1】______ofanenormous【C2】______reassessingtheChinesecontr

Somepeople______inpartthedefeatoftherevolutioninFranceandGermanytotheEnglishdiplomacy.

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烧伤患者，高热灼手，汗多气粗，口渴头痛烦躁不安，舌红绛苔黄，脉洪数。其证型是

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