— does it take to go to Hangzhou from Wenzhou by train?—It usually takes about three hours

问题补充：

— does it take to go to Hangzhou from Wenzhou by train?

—It usually takes about three hours.

A. How long

B. How much

C. How many

D. How often

答案：

(答案→)A. How long

B. How much

C. How many

D. How often

解析：句意：从杭州到温州坐火车需要多长时间？通常要小时。A. How long“多长时间”；B. How much“多少钱”；C. How many“多少”；D. How often“多长时间一次”。结合句意，故选A。