--- Where is Jack? I can’t find him anywhere.--- He ______ his homework upstairs.
#63513
A
might have done
B
must have done
C
might be doing
D
must do
推荐题目
—How is the debate of your essay?—It ____ well, but I ____one of the key points.
#62979
A
might work; hadn’t forgot
B
needn’t have worked; forgot
C
could have worked; forgot
D
would work; hadn’t forgot
—What do you think of John?—He’s a good boy, but he ______ be really stubborn at times.
#62697
A
can
B
might
C
must
D
need
Being examined twice a year, whether it is a car or a bus or a truck, it is the rule that every driver____ obey in this city.
#63081
A
shall
B
can
C
has to
D
need