Question

【题目】—_______ do you go on a picnic?

—About once a week.

A. What time B. How often C. How long D. How much

Answer 1

【答案】B

【解析】句意：——你多久去野餐一次？——大约一周一次。A. What time什么时间；B. How often 多久一次；C. How long多长时间；D. How much多少，后跟不可数名词。答语“About once a week.”大约每周一次，表示频度，对频度提问要用how often，故选B。