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
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____________the gloves? They’ re very nice. They feel soft and smooth.
#60079
A
What do you think of
B
What do you like
C
How do you do
D
How would you like
I don't think she could have done such a stupid thing yesterday, _____?
#64787
A
do I
B
could she
C
did she
D
has she
---_________ watch the football match with them together?
#60285
A
Why not you
B
Why didn’t
C
Why not
D
Why don’t