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 regret to say that I failed to rank first in the terminal exam.—Come on，nobody ________ win all the time.
#62288
A
should
B
must
C
shall
D
can
— What does the sign over there say? — No person _________ bring drinks into the student computer room.
#62568
A
will
B
may
C
shall
D
must
A: Listen! Is it Linda singing in the next room? B: No, it __________ be her. She is still in Shanghai.
#76674
A
can’t
B
couldn’t
C
may not
D
might not