─             did they go to work last week ?     ─Once .
#70504
A
How many times
B
How often
C
How soon
D
How long
推荐题目
It’s really cold today, ______ ?
#71017
A
does it
B
doesn’t it
C
isn’t it
D
is it
Let’s go and have a rest,      we?
#69538
A
do
B
shall
C
haven’t
D
will
--You used to be quiet, ____you?--Yes, and I used to be very shy.
#69058
A
wasn’t
B
didn’t
C
aren’t
D
haven’t