Jim______ sing Chinese songs very well now, but he______do it last year.
#75382
A
can; can’t
B
could; can’t
C
can; couldn’t
D
could; couldn’t
推荐题目
A hard-working man _____ become a great scientist, but a great scientist _____ be a hard-working man.
#75893
A
can’t, can
B
may not, can
C
can’t, must
D
may not, must
Don’t be angry with us. We ____ with you together, but we were busy with our final reports when you called in.
#63012
A
would eat out
B
must have eaten out
C
should eat out
D
could have eaten out
The weather in Inner Mongolia is always dry, but sometimes it _____ rain heavily.
#62867
A
need
B
can
C
must
D
shall
--- _______ I come back before 6 o’clock?---No，you _______．But you _______ be back later than 7 o’clock．
#76770
A
Need；must；must
B
May；mustn’t；can’t
C
Can；can’t：can’t
D
Must；needn’t；can’t