---____ do you exercise, Miss Lin? ---Once a week. 
#60244
A
How long
B
How often
C
How far
D
How soon
推荐题目
.—What _____ this time tomorrow morning? —Er…, I’m not sure for the moment.
#64996
A
will you do
B
will you be doing
C
are you to do
D
are you going to do
 --Are these your books?--______.
#59805
A
Yes ,these are.
B
No, they are.
C
No, it isn’t.
D
Yes, they are.
_______is the population____the USA?
#60189
A
What, of
B
What, in
C
How many, in
D
How many , of
A lovely day,      ?
#65226
A
is it
B
does it
C
isn’t it
D
doesn’t it