---_____ does she chat with friends on the Internet?--- Once a week.
#59954
A
How long
B
How often
C
How many times
D
How much
推荐题目
You must have read about Mark Twain long ago, ____?
#64539
A
mustn't you
B
haven't you
C
didn't you
D
needn't you
 It must be he that has stolen Mr. Smith’s purse, _____?
#65383
A
hasn’t he
B
isn’t he
C
mustn’t it
D
isn’t it
What he lacks is more patience,___________? 
#65487
A
isn't it
B
is it
C
doesn't he
D
does he