—Doctor I want to know .—Three times a day after meals.A. how many times do I take my tem

问题补充：

—Doctor, I want to know .

—Three times a day after meals.

A. how many times do I take my temperature

B. how often I take my medicine

C. how I do some exercise

D. when do I wash my hands

答案：

A. how many times do I take my temperature

(答案→)B. how often I take my medicine

C. how I do some exercise

D. when do I wash my hands

解析：宾语从句的结构：主语+谓语+连接词+从句。从句在句中作宾语。从句要用陈述句的语序。AC语序不正确，根据回答，饭后一日三次，可知问多久一次，故选B。