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 think you have made great mistakes, _______?
#64903
A
do you
B
don’t you
C
have you
D
haven’t you
— ____ do you do on Halloween?— We play games and have lots of fun.
#60081
A
How
B
Where
C
What
D
When
— __________ is the hospital?— It is about ten minutes’ ride away from here.
#60116
A
How many
B
How often
C
How far
D
How soon
—What’s wrong with my computer, Jack?—Let me have a check. OK, it works now.—You mean, nothing wrong with it, ________ ?
#64467
A
is there
B
isn’t there
C
is it
D
isn’t it
What the young man said sounds strange，_______it is true.
#65401
A
but and
B
yet and
C
and but
D
and yet