问题
In order to make our city green, _____.[ ]
A: it is necessary to have planted many trees
B: many more trees need to plant
C: our city needs more trees
D: we must plant more trees
B: many more trees need to plant
C: our city needs more trees
D: we must plant more trees
正确答案是：
同类题型
ou tell me what time the flight to Detroitleaves—I’m sorry, but it _______________.
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