The boss ______ the worker how to do it, or the accident couldn’t have happened.
#63303
A
can’t have told
B
ought to tell
C
could have told
D
mustn’t have told
推荐题目
He failed in the driving test again. He         .
#62842
A
must have disappointed
B
must have been disappointed
C
might be disappointed
D
couldn’t be disappointed