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
To my surprise, my good friend _________ stay up to study to prepare for the next important exams organized by ten famous high schools.
#87867
A
should
B
may
C
must
D
can
He suggested that we ____ the plan later, which suggested that he ____ against it.
#87794
A
discussed; was
B
would discuss; should
C
discuss; was
D
should discuss; should be
The committee has recommended that the training program _______ improved .
#86949
A
would be
B
is
C
was
D
be
Emergency line operators _______ always stay calm and make sure that they get all the information they need to send help.
#87182
A
can
B
would
C
must
D
might
— Catherine, I have cleaned the room for you. — Thanks. You ______ it. I could manage it myself.
#90498
A
needn’t do
B
needn’t have done
C
mustn’t do
D
shouldn’t have done