The earth is our home. We must _____ it clean.[ ]A. change B. sweepC

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The earth is our home. We must _____  it clean.[     ]
A. change
B. sweep
C. keep
D. build

答案

举一反三

Nothing can _____  me from going out. [     ]
A. stop
B. keep
C. prevent
D. all the above

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—Do you know the way to the post office?
—Yes. Follow me and I"ll _____ you.  [     ]
A. call
B. pick
C. show
D. invite

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—What are these flowers for?
—We"re going to use them to _____ the Christmas tree. Would you please help us put them in the tree?[     ]
A. celebrate
B. create
C. decorate
D. produce

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I ______eight hours a day.        [     ]
A. go to bed
B. am going to bed
C. am sleeping
D. sleep

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Lorna _____ from the University of London in  2004 and now works in a university. [     ]
A. devoted
B. honoured
C. graduated
D. succeeded

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