Everypossiblemeanstopreventthe

Every possible means ________ to prevent the air pollution, but the sky is still not clear.

A．is used

B．are used

C．has been used

D．have been used

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相关试题

——Excuse me， ____________? ——That's 110 yuan altogether， sir，

A．can I order， please	B．could I have the bill， please
C．how much is the meal we've had	D．please count the money， will you

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—Sorry， I couldn't find the magazine you asked for.
— ____________.

A．Don't mention it

B．No problem

C．It's all the same

D．Thanks anyway

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— Do remember to take this medicine three times a day with warm boiled water.
— _________.

A．Heard it

B．Made it

C．Got it

D．Taken it

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—Are you sure you really want it?
—_______，I am willing to pay ________price you ask．

A．No；no matter what	B．Yes；no matter what
C．No；whatever	D．Yes；whatever

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—It's cloudy outside. Please take an umbrella. — __________.

A．Yes， take it easy	B．Well， it just depends
C．OK， just in case	D．All right， you're welcome

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