have you been to Tianjin?---Twice.A. How manyB. How many timesC. HowDHow many time

问题补充：

have you been to Tianjin?---Twice.

A. How many

B. How many times

C. How

DHow many time

答案：

A. How many

(答案→)B. How many times

C. How

D. How many time

解析：twice的意思是“两次”。所以根据意思可推断，上句应该是问多少次。time表示“次数”时，是可数名词。所以应该用How many times。而How many“多少”和How“怎样”明显不符合题意。所以本题选B。