问题补充：
— a week do you walk your dog? —Less than three times a week.
A. How often
B. How many times
C. How long
D. How soon
答案：
A. How often
(答案→)B. How many times
C. How long
D. How soon
解析：
试题分析: 句意：你一周遛狗几次？一周不到三次。 How often多久一次， How many times 几次，How long多久，How soon多久；less than少于；根据Less than three times a week.一周少于3次，可知问一周几次，根据问句中a week一周，可知问几次，故选B.
