With all his money, he _________ worry about a little thing like 5 cents! 
#86952
A
can
B
must
C
may
D
should
推荐题目
--I'm told that John had another car accident this morning.--I believe not. He  _________so careless.
#90014
A
shouldn't have been
B
wouldn't have been
C
couldn't have been
D
mustn't have been
It’s a shame ______ able to give them any advice.  
#87215
A
not to have been
B
to have not been
C
to have been not
D
to not have been
______ him well, I would have invited him to my birthday party.
#87956
A
Had I known
B
Should I know
C
If I know
D
If I knew