We all know that we ________ our carbon footprint, but I suspect that many people wouldn't be prepared to go as far as Joan Pick, a retired scientist living in south London.
#62336
A
must have reduced
B
should have reduced
C
may have reduced
D
could have reduced
推荐题目
－It’s Sunday today, so you get up so early.－Yes, I can have a good rest.
#74418
A
don’t need
B
don’t have
C
haven’t
D
needn’t
According to common practice, the president _________ hold office for five years.
#62922
A
must
B
shall
C
need
D
will
One of our rules is that every student ____ wear school uniform while at school.
#62683
A
shall
B
could
C
might
D
will
Today is Wednesday. He _______ be at home. He _____ be at school.
#77309
A
can’t, can
B
can’t, must
C
mustn’t, must
D
mustn’t, can
He _______ have taken your car by mistake because he didn’t have the keys.
#63034
A
mustn’t
B
shouldn’t
C
couldn’t
D
needn’t