Recently,anewresearchhassugges

Recently, a new research has suggested the possibility in a popular magazine ______ pleasant smells might reduce pain.

A．why

B．whether

C．that

D．how

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相关试题

Hainan is a very large island and it’s the second island in China.

A．large

B．larger

C．largest

D．most large

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Some students were late for class because they had been _________ by the heavy storm.

A．kept

B．stopped

C．slowed

D．delayed

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________ you don’t lose heart, I’m sure you can pass the coming examination.

A．Unless

B．If not

C．As long as

D．Although

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—How much of the foreign expert’s speech have you understood?
—Almost nothing. I wish I ________ harder at English.

A．worked

B．had worked

C．would work

D．were working

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At the crossroads, you have to drive very ________ to avoid traffic accidents.

A．quickly

B．cautiously

C．curiously

D．perfectly

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