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
--What do you think of the book you borrowed from the library yesterday? --I have no idea. I____________ read it.
#77721
A
don’t
B
can’t
C
haven’t
D
am not going to
--- It’s so late. Our son______ be back!--- Don’t worry. I dare say he ______ have some extra work to do.
#62953
A
can; must
B
will; might
C
should; must
D
must; may
My neighbor was like a cat on hot bricks before her driving test.
#77855
A
very exited
B
sad
C
relaxed
D
very nervous
People ______always be careful with fire， or it can be dangerous.
#76425
A
can
B
needn’t
C
must
D
shouldn’t