How often do you eat out ?- , but usually once a week.A. Have no ideaB. As usualC.

--- How often do you eat out ?
--- , but usually once a week.
A. Have no idea
B. As usual
C. It depends
D. Generally speaking

A. Have no ideaB. As usual(答案→)C. It dependsD. Generally speaking解析：考查交际用语：A. Have no idea我不知道B. As usual象平常一样C. It depends那就看情况而定了，D. Generally speaking一般来说，句意：--你多长时间出去吃饭？--那就看情况而定了，但经常是一星期一次。选C。

这个答案应该是对的