题目内容
17. In order to make out city green, ________.
A) it in necessary to have planted more trees
B) many more trees need to plant
C) our city needs more trees
D) we must plant more trees
D
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题目内容
17. In order to make out city green, ________.
A) it in necessary to have planted more trees
B) many more trees need to plant
C) our city needs more trees
D) we must plant more trees
D