The children planted more trees after they ________Greener China. [ ]A. join

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The children planted more trees after they ________Greener China. [     ]
A. joined
B.  took part in
C.  became
D.  were

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举一反三

The old man ________ all his free time in collecting stamps.  [     ]
A. costs
B. pays
C. spends
D. too

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I saw him ________ out when I was walking past.         [     ]
A. to go
B. go
C. went
D. goes

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Who was the first one ________? [     ]
A. to reach
B.  to arrive
C.  to get to
D. to arrive at

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She ______ the national football team in 2000.[     ]
A. took part in
B.  take part in
C.  join
D. joined

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— Oh, I"ve left my keys in the classroom.
— Don"t worry. I"ll _____ it for you.[     ]
A. carry
B. bring
C. take
D. fetch

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