The research is so designed that, once , nothing can be done to change it.A．begins B．having begun C．begun D．Beginning 题目和参考答案——青夏教育精英家教网—

The research is so designed that, once _______, nothing can be done to change it.

A．begins

B．having begun

C．begun

D．Beginning

解析试题分析：该题主要考查省略句的用法。译文：这项研究就这样定下了，一旦开始就无法改变。
句中once作“一旦……”讲，引导一个条件句，出于这个条件句的主语与主句的主语（the research）一致，所以省略掉了主语it和系动词is，只剩下一个过去分词begun，故最佳答案应选D。A项的错误在于缺少主语，B、D两项都是现在分词，不能用在条件句中作谓语，故可排除。
考点：考查省略句的用法。

练习册系列答案

年级	高中课程	年级	初中课程
高一	高一免费课程推荐！	初一	初一免费课程推荐！
高二	高二免费课程推荐！	初二	初二免费课程推荐！
高三	高三免费课程推荐！	初三	初三免费课程推荐！
更多初中、高中辅导课程推荐,点击进入>>

相关习题

科目：高中英语 来源： 题型：单选题

You must have missed the first train yesterday, ________ you?

A．weren’t

B．mustn’t

C． didn’t

D． haven’t

查看答案和解析>>

科目：高中英语 来源： 题型：单选题

It is_____the pupils do in their spare time_____ really______ them to take their place in society as citizens when they grow up.

A．what; that; prepare	B．that; what; prepares
C．what; that; prepares	D．that; what; prepare

查看答案和解析>>

科目：高中英语 来源： 题型：单选题

is no need .

A．It; complaining	B．That; complaining
C．There; to complain	D．This; to complain

查看答案和解析>>

科目：高中英语 来源： 题型：单选题

Though ______in a big city, Peter always prefers to paint the beautiful scenes of country life.

A．raised

B．was raised

C．raising

D．raises

查看答案和解析>>

科目：高中英语 来源： 题型：单选题

He told me it was the reason _______ he explained just now _______ made him come late yesterday.

A．which; which

B．which; that

C．why; that

D．why; which

查看答案和解析>>

科目：高中英语 来源： 题型：单选题

The door burst open and________, shouting with anger.

A．in rushed a crowd

B．in rushing a crowd

C．rushed in a crowd

D．in a crowd did rush

查看答案和解析>>

科目：高中英语 来源： 题型：单选题

_____ most of these languages are now threatened and may disappear is a serious matter to the people in Britain.

A．The

B．Why

C．That

D．不填

查看答案和解析>>

科目：高中英语 来源： 题型：单选题

Ｉdon’t think Linda could have done such a stupid thing last night，_________?

A．do I

B．didn’t she

C． did she

D．don’t I

查看答案和解析>>

同步练习册答案

练习册

高中

初中

小学