–Mr Li always spends lots of time explaining things ______ us.–I agree. He’s patient enough to repeat them _______ us.
When he saw his old friend, he stopped with him.
Betty to represent our school to take part in the Maths Olympics.
If there _____no buying and selling of a nimals, there___ no killing in nature.
I never drink coffee. -------______________.
I’m going to Sanya for the summer holiday ?-------______________!.