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
—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
Black doesn’t believe his son is able to design a digital camera,_____?
#64544
A
is he
B
isn’t he
C
doesn’t he
D
does he
---Lily, how long __________ the Football Club? ---Since two months ago.
#60272
A
you have joined
B
have you joined
C
you have been in
D
have you been in
—I don’t suppose Jimmy could have done well in the mid-term exam last week,______?--- ______ he almost failed in the exam．
#64525
A
had he; Yes
B
did he ; No
C
do I ; Yes
D
could I ; No
___you_____to the beach this summer vacation?No ,I went to the village.
#59832
A
Are ;going
B
Do ; go
C
Did ; go
D
Did ;went