Only after Mary read her article a second time _____the spelling mistakes.A．did

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Only after Mary read her article a second time _____the spelling mistakes.

A．did she notice	B．she noticed
C．does she notice	D．she has noticed

答案

解析

试题分析: 考查倒装句。Only +状语位于句首时后面用部分倒装；从Mary read 可知句子是过去时态，所以A选项正确。句意：直到又读了一遍自己的文章，她才发现了那些拼写错误。

举一反三

He failed the mid-term examination and only then________how much time he had wasted.

A．he realized	B．did he realize
C．he had realized	D．had he realized

题型：不详难度：| 查看答案

Not once ________ to Michael that he could one day become a top student in his class.

A．occurred it	B．did it occur
C．it occurred	D．it did occur

题型：不详难度：| 查看答案

________ a mobile phone can you ring ______ you want to talk with anyway.

A．Using; whoever	B．Only on; whomever
C．By; whatever	D．With; anyone

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Only when _____ be possible to sign the contract.

A．the lawyer comes it will

B．does the manager come will it

C．has the manager come it will

D．the manager comes will it

题型：不详难度：| 查看答案

______ the teacher has given permission, ______allowed to use the equipment in the lab.

A．Only if, are the students	B．If only, the students are
C．If only, are the students	D．Only if the students are

题型：不详难度：| 查看答案