Jack _______ swim when he was five years old. 
#78233
A
can
B
could
C
may
D
must
推荐题目
The door ________ open, no matter how hard she pushed. 
#62946
A
shouldn’t
B
couldn’t
C
wouldn’t
D
mightn’t
 You_______ play with fire, Tom. It's dangerous.
#75026
A
needn't
B
shouldn't
C
mustn't
D
wouldn't
--- Alice looks sad. Did you tell her about her brother’s accident?--- Sorry, I ________ her just before her final exams.
#62956
A
can’t tell
B
mustn’t have told
C
needn’t tell
D
shouldn’t have told