题目内容

Engines are machines _______ power or motion.

A. produce
B. producing
C. produced
D. which producing

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With no rain for months and fresh water ________, the situation in Yunan Province was getting from bad to worse .

A. run out
B. run out of
C. running out
D. running out of

Early this year cruel snowstorms hit southern China , ________ great transportation problems in some areas .

A. causing
B. caused
C. to cause
D. having caused

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A. Not known
B. Not knowing
C. Don’t know
D. Not to know

More cycles have been shared in our city, ________ it much easier for the bus drivers to drive on the road.

A. having made
B. made
C. be made
D. making