---Isn’t that your teacher over there? ---No, it ______ be him. I’m sure he doesn’t wear glasses.
He was satisfied because his work was_________.
Don’t take things________ others.
It was reported that many helicopters were sent there _________the missing passengers.
---May I open the window to let in some fresh air? ---__________.
He has called several times this morning, ____ there is something very urgent.