题目内容
—There is a lot of wind in North China.
—Well, more trees ________ every year to stop the wind.
A. must be planted B. can planted C. should planted D. planted
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题目内容
—There is a lot of wind in North China.
—Well, more trees ________ every year to stop the wind.
A. must be planted B. can planted C. should planted D. planted