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
I ________ work out the problem at first, but after my teacher showed me an example, I ________ get the answer easily.
#63120
A
couldn’t; was able to
B
can’t; could
C
wasn’t able to; could
D
was able to; was able to
The public transportation is very convenient in that big city , so there______be any difficulty in traveling around .
#63333
A
mustn’t
B
wouldn’t
C
shouldn’t
D
needn’t
—Is Mary coming by plane?—He should ,but he _____not. He likes traveling by train.
#63413
A
must
B
can
C
need
D
may
He ________ if he works hard for the people.
#62513
A
shall praise
B
shall be praised
C
will praise
D
will be praised