---Excuse me,are these your books? ---Oh,Yes,They are. ---_______. ---Thank you very much.A Here you are B Here it is C Here are you D They’re here
You’d better stay at home. It’s raining_________ .
People should _________ down trees in order to protect the environment.
He has read_________ many books _________ he knows a lot about the world.
John with his parents _________ been in Australia for about two years.
I’m afraid that no one knows_________ .