Trees and flowers _____ every year to make our country more beautiful. [ ]A.

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Trees and flowers _____ every year to make our country more beautiful. [ ]
A. is planted
B. was planted
C. are planted
D. were planted

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举一反三

We _____ into five groups to go to the old people"s homes. We did many things to cheer them up. [ ]
A. divided
B. are divided
C. were divided

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A lot of food _____ to that country after the war was over.[ ]
A. was sent
B. are sent
C. is sending
D. sent

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Mr. Johnson"s story _____ by everyone who heard it. [ ]
A. laughed at
B. was laughed
C. laughed
D. was laughed at

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I believe that these mountains _____ with trees in a few years" time. [ ]
A. are covered
B. will be covered
C. are covering
D. will cover

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The personal computer _____ in 1976. It has changed the whole world.[ ]
A. has been invented
B. is invented
C. was invented
D. invented

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