问题
____ do you clean the classroom?— Three times a day. [ ]
A: How long
B: How often
C: How soon
D: How many
B: How often
C: How soon
D: How many
正确答案是：
同类题型
______ are the Olympic Games held?—Every three years. [ ]
It’s that time ________ year again. [ ]
This is _______ armchair. I’m writing with ________armchair.
What were you doing when you heard Malaysian airlines flight lost?—I my homework.
When did your parents get back home last night?—At around ten o’clock.