He _______ have completed his work；otherwise, he wouldn’t be enjoying himself by the seaside.
#63103
A
should
B
must
C
wouldn’t
D
can’t
推荐题目
－Shall we go hiking this Sunday? －Sorry, I _______. I’ll have to take a piano lesson.
#74286
A
may not
B
can’t
C
needn’t
D
mustn’t
Looking after very young children _____ be very annoying sometimes, but you’ll get used to it after a while.
#62887
A
must
B
should
C
shall
D
can
—Can I go to the park, Mum?—Certainly. But you ______ be back by six o’clock.
#76284
A
can
B
may
C
might
D
must