--has he been like this?--Ever since last week.A. How longB. How soonC. How oftenD. How mu

问题补充：

--has he been like this?

--Ever since last week.

A. How long

B. How soon

C. How often

D. How much

答案：

(答案→)A. How long

B. How soon

C. How often

D. How much

解析：根据答语“Ever since last week”（自从上周以来）可知，询问的应是时间段，故用how long来提问。