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Scientists are warning that ________ emissions of carbon (碳排放) are cut, we could be heading for an environmental disaster.

A．before	B．as
C．unless	D．in case

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In Scandinavian countries it is common ____ for the husband to stay at home to look after the baby.

A．use

B．sense

C．practice

D．idea

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He has ____ letters to deal with. He has to work from morning to night.

A．many of

B．a great deal of

C．masses of

D．the number of

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Social attention should be paid ____ our earth from ____.

A．to preventing; being polluted	B．to prevent; polluting
C．to prevent; being polluted	D．to preventing; polluted

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–It’s hard for me to go to sleep.
–Try to ____ the amount of coffee you drink during the day.

A．cut up

B．cut in

C．cut down

D．cut off

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There was a big fire in the building last night. ____, all the people were able to escape.

A．Unluckily

B．Fortunately

C．To be sure

D．Above all

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