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
---Must I work out the problem right now?---Yes, you _______. It’s very serious.
#75573
A
can
B
must
C
may
D
should
Nowadays, a graduate with a master’s degree_____ fail to find a high--paid job , which discourages a lot of college students.
#63092
A
shall
B
can
C
will
D
must
(2010·辽宁高考)Doctors say that exercise is important for health, but it ________ be regular exercise.
#62385
A
can
B
will
C
must
D
may
--Morn, must I clean my room now? --No, you . You can do it tomorrow.
#76387
A
can't
B
needn't
C
mustn't
D
shouldn't
_Can you write a letter in English? _No, I______.I know only a little English.
#77488
A
can’t
B
needn’t
C
may not
D
mustn’t