单选题 —How often do you eat out?
—______, but usually about twice a month.
A. No idea B. As usual
C. It depends D. Generally speaking

【正确答案】 C

【答案解析】[考点] 日常会话用语
[解析] 根据会话语境，去饭店吃饭的频率不确定，一般为一月两次。正确答案为C项“It depends(不确定)”。