— ____ do you clean the classroom?— Three times a day.
#59294
A
How long
B
How often
C
How soon
D
How many
推荐题目
 If you don’t know the new word, you’d better __.
#58132
A
look up a dictionary
B
look up an dictionary
C
look it up in a dictionary
D
look up it dictionary
The music often makes me ________ of my old friends.
#59833
A
thinks
B
to think
C
think
D
thinking