We were told by our teachers that light________faster than sound.[ ]A. trave

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We were told by our teachers that light________faster than sound.[     ]
A. travelled
B. has travelled
C. travels
D. will travel

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举一反三

We live day by day, but in the great things, the time of days and weeks ________ so small
that a day is unimportant.[     ]
A．is
B．are
C．has been
D．have been

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It is nice to see millions who had nothing but a record of misery and hungry ________ to improve their life and living conditions.
[ ]
A. having the chances
B. have the chance
C. to have the chance
D. had the chance

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-- Imagination _____ important in science, and it helps us dream up our future.
-- You are definitely right. If only something _____ allow me to see insects and spiders
magnified without getting closer to them. [ ]
A. was; would
B. is; will
C. will be; can
D. is; could

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If the bottle of gas________fire, the whole building may _________.[ ]
A. catches ; be burned to the ground
B. will catch ; be burned down
C. is on ; burn down
D. will be on; be burned down

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In the picture, between two closely-located buildings____ a big tree.[ ]
A. grow
B. grows
C. has grown
D. have grown

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