In order to make our city green, .
A. it is 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
网友回答
A. it is necessary to have planted more trees
B. many more trees need to plant
C. our city needs more trees
(答案→)D. we must plant more trees
解析： “使城市绿化”是“我们(we)”的目的。