---Does the teacher know everybody _______ planted the trees?·---Yes, he does.
________ concerts are never quite the same on the small screen.
--- Mr Wu, could you tell me ________? --- You’d better do more speaking.
--- Staying up late is bad for your health. ---You are right. I decide to ________.
________ everybody is here, let’s begin our meeting.
It’s said that his father was attacked ________ a man ________ a knife.