---Please say “ I’m here ”when your name _____ ,will you ?--- Yes, Mr Hu.
The students are going to discuss ______ the problem with their teacher.
Yesterday I went shopping with my brother, ______ bought nothing.
Go and ask the children ______ noise in the next room.
The trip to the famous old town ______ about three hours last week.
Don’t ______ until the bus stops.