Malaysia Airlines Flight 370 ___________ course and turned back toward Kuala Lumpur -- but there were no indications from the pilot that he was doing so.
#86442
A
must have changed
B
could have changed
C
might have changed
D
should have changed.
推荐题目
Bob insisted that he ________ nothing wrong and ________ from work.
#87118
A
did; won’t be fired
B
had done; not be fired
C
should do; mustn’t be fired
D
do; shouldn’t be fired
--Has he passed the exam yet?  ---No,He ___ it if he had studied harder.
#88949
A
would pass
B
passed
C
should has passed
D
would have passed