Some aspects of a pilot's job be boring, and pilots often work at inconvenient hours．
#63217
A
can ; have to
B
may ; can
C
have to; may
D
ought to; must
推荐题目
--- Would you mind if I smoked here?---I am afraid…, but if you________.
#63164
A
will
B
must
C
would
D
may
Mr. Bush is on time for everything. How _______ it be that he was late for the opening ceremony?
#76235
A
should
B
can
C
may
D
must
(2012·重庆高考)—________ you interrupt now? Can't you see I'm on the phone?—Sorry Sir, but it's urgent.
#62378
A
Can
B
Should
C
Must
D
Would
Sorry I’m late. I ____ have turned off the alarm clock and gone back to sleep again.
#63143
A
might
B
should
C
need
D
will
She _____ your birthday party, but she had to look after her mother in hospital．
#63325
A
should attend
B
ought to have attended
C
can have attended
D
must have attended