These broken pieces of plates don’t fit together, they ___________ parts of different ones.

— I think Mr. Zhang may be in his office.— No, he _____ be there. I saw him ____ there just now.

----- I’m sorry . I ________ at you the other day .  ----- Forget it. I was also a bit out of control of myself.

One of our rules is that every teacher      wear school uniform while attending the school flag-rising ceremony. 

---When shall we meet your cousin at the station? ---His plane took off 2 hours ago, and it _________ arrive at 5pm.