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。