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

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. Have no idea不知道，B. It depends那就看情况而定了，C. As usual象平常一样， D. Generally speaking一般来说，句意：--你多长时间在外面吃一次饭？--那就看情况而定了，但通常是一星期一次。选B。