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

问题补充：

--- How often do you eat out ?

--- , but usually once a week.

A. Have no idea

B. As usual

C. It depends

D. Generally speaking

答案：

A. Have no idea

B. As usual

(答案→)C. It depends

D. 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。