问题
选择题
---_____ do you eat junk food?
--- I like it. I eat it three times a week.
A．How long
B．How far
C．How often
D．How much
答案
C
题目分析: 句意：你多久吃一次垃圾食品？我喜欢吃，一周吃三次。How long 多久，How far多远， How often 多久一次， How much多少。根据 I eat it three times a week.我一周吃三次，可知是询问频率，故选C.