--How often do you eat out?-- but usually once a week.A. Have no ideaB. It dependsC. As u

问题补充：

--How often do you eat out?

--, but usually once a week.

A. Have no idea

B. It depends

C. As usual

D. Generally speaking

答案：

A. Have no idea

(答案→)B. It depends

C. As usual

D. Generally speaking

解析：考查交际用语。A不知道；B看情况；C和平时一样；D一般说来。句意：—你多久出去吃一次饭？—看情况，但通常是一周一次。根据句意说明B正确。