题干
You don't know ______ I want to see you again. It's a year since I last saw you.
A：how soon
B：how long
C：how much
D：how often
答案(点此获取答案解析）
C
You don't know ______ I want to see you again. It's a year since I last saw you.
A：how soon
B：how long
C：how much
D：how often
