Fighting an artificial greenhouse effect seems to be the greatest of environmental challenges, ________？
#64479
A
isn't it
B
does it
C
doesn't it
D
is it
推荐题目
—I don't imagine Russ and his poor dog had a good time on the deserted island，________？—I have no idea.
#64455
A
didn't they
B
do you
C
did they
D
hadn't they
Don't forget the appointment with the principal at the registry office, _____you
#65477
A
don't
B
do
C
will
D
shall
You must have watched that football match last night, __________?
#64502
A
must you
B
haven’t you
C
didn’t you
D
aren’t you