---Are you coming to Betty’s wedding? ---I’m not sure. I ______ go to Beijing on business that day.A. must B would C. should D. might
This kind of gel pen which ______ smoothly is quite popular with students.
It is the bus driver who should ______ the safety of the passengers.
I’m very grateful to my high school teachers, without ______ help I wouldn’t be so excellent.
I ______ for Shanghai this Saturday, so I want to know when the earliest plane ______.
He ______ it on schedule, but somehow he fell behind.