They _____ have arrived at lunch time but the flight was delayed.
#63460
A
should
B
can
C
must
D
will
推荐题目
—To make our city more beautiful, rubbish         into the river. —I agree.
#78182
A
needn’t be thrown
B
mustn’t be thrown
C
can’t throw
D
may not throw
He ________ if he works hard for the people.
#62513
A
shall praise
B
shall be praised
C
will praise
D
will be praised