题目内容
（请给出正确答案）
[主观题]
The suggestion made by the organization is to solve the problem that ________.[A] t
The suggestion made by the organization is to solve the problem that ________.
[A] there is not enough space for building cites on land
[B] land transportation has became increasingly difficult
[C] there are too many people on land
[D] present cities are heavily polluted by cars
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