It takes a long time to go there by train; it's by road. A. quickB. the quickestC. much qu

问题补充：

It takes a long time to go there by train; its by road.

A. quick

B. the quickest

C. much quick

D. quicker

答案：

A. quick

B. the quickest

C. much quick

(答案→)D. quicker

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