— She suggested the number of cars should be limited to stop air pollution. — the idea is

问题补充：

— She suggested the number of cars should be limited to stop air pollution.

—, the idea is not very practical.

A. Sounds good as it

B. As it sounds good

C. As good it sounds

D. Good as it sounds

答案：

A. Sounds good as it

B. As it sounds good

C. As good it sounds

(答案→)D. Good as it sounds

解析：句意：--她建议为了阻止空气污染，必须限制汽车的数量。--虽然听起来很好，但是这个想法不太实用。这里使用as的倒装句，表示“虽然”，结构是：名词/动词/形容词/副词+as/though+主谓，所以选D。