Whenaboutoneofthebiggestproble

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When about one of the biggest problems today, many experts say that an energy crisis is approaching and is thus threatening mankind's survival．

A．asked

B．being asked

C．having asked

D．asking

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Li Hua has succeeded in the entrance examination and his dream ______ being a university student will ______.

A．about; be true	B．from; turn into practice
C．in; become a fact	D．of; come true

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— Excuse me, what's the time for Train 8201?
— It _____ at seven and you can wait in the hall.

A．left	B．leaves
C．will leave	D．has left

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_____ students are practicing _____ English with each other at the English corner.

A．The number of; to speak	B．A great deal of; spoken
C．A great many; speak	D．A number of; speaking

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You'd better _______ your score and see if you have passed the exam.

A．add up	B．add to
C．add up to	D．add

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The physics teacher once said that we first _____the lightning followed by thunders because light ______ faster than sound.

A．see; traveled	B．saw; traveled
C．saw; travels	D．see; travels

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