— ____ 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
This blue down coat (羽绒服) looks nice. I want to ________. 
#53973
A
try up it
B
try on it
C
try it up
D
try it on
Bill with his parents ________ China since two years ago.
#55434
A
have been in
B
have gone to
C
has been in
D
has been to
My father often ________ Beijing for Shanghai.
#54450
A
draws
B
leaves
C
cleans
D
lives