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
Thank you for all your hard work last week. I don’t think we ____ it without you.
#90460
A
can manage
B
could have managed
C
could manage
D
can have managed
. --- Did you often e-mail your family during the first year at university? --- No. I was so busy meeting new people that I didn’t write to my family as I _____.
#88090
A
ought to
B
should do
C
should have written
D
should have
The professor gave orders that the test ____before 5:30.
#86937
A
be finished
B
will finish
C
will be finished
D
shall finish
If he had started at nine o’clock,he have been in London by eleven o’clock.
#89650
A
must
B
may
C
ought to
D
has to
Jack,you’re so lazy!This job hours ago.
#89651
A
should finish
B
must have finished
C
ought to have been finished
D
was about to finish