单选题 —How often do you drop your e-pal a line?
— ______ , but usually once a week.

A、 As usual
B、 It depends
C、 Generally speaking
D、 Have no idea

【正确答案】 B

【答案解析】[考点] 口语应用与省略
[解析] 由but usually once a week可知，A项As usual“与平常一样”，C项Generally speaking“一般来说”和D项Have no idea“不知道”与其后答语相矛盾，不是正确答案。It depends“依情况而定”与语境相符。