— times did you do exercise last week? — Twice.A. How oftenB. How much C. How manyD. How

问题补充：

— times did you do exercise last week? — Twice.

A. How often

B. How much

C. How many

D. How long

答案：

A. How often

B. How much

(答案→)C. How many

D. How long

解析：句意：—你上周做了几次运动？—两次。A为“多久一次”，表频率；B为“多少”，后接不可数名词；C也是“多少”，后接可数名词。D为“多久”，可表时间。题中times为可数名词的复数，故选C。