Somethingmustbedonetopreventou

Something must be done to prevent our city ____ by thick smoke.

A．to be polluted

B．from polluting

C．from being polluted

D．polluting

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the distance was too long and the time was short, we decided not to drive to Florida.

A．Discovering

B．To discover

C．To have discovered

D．Discovered

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A．being laughed

B．laughing

C．to laugh

D．to be laughed

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--- Do you think we can get there on time?
--- Yes, the car doesn’t break down.

A．even if

B．unless

C．until

D．as long as

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A．come to

B．adopt to

C．refer to

D．adapt to

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Though injured seriously, he tried to , hoping to make his parents less worried.

A．cheer up

B．light up

C．jump up

D．take up

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