He _____ be really difficult at times even though he ,generally speaking, is a nice person. 
#63426
A
can
B
should
C
shall
D
must
推荐题目
Oh, I’m not feeling well in the stomach. I _________ so much mushroom this morning.
#63495
A
shouldn’ t eat
B
musn’t have eaten
C
mustn’t eat
D
shouldn’t have eaten
You_______ play with the knife. You ______ hurt yourself.
#77296
A
mustn’t; may
B
mustn’t; must
C
shouldn’t; must
D
can’t; should