---It _____ ten years since we _____ last time.
---Yes. How time flies!
A.was ;meet B.was ;met
C.has been; met D.is ;meet
---Why don't you go hiking today?
----I prefer ______ at home to ______out because the weather is too bad.
A.staying ; going B.stay ; go
C.to stay ;go D.stay;going
---How many Chinese astronauts ______ into space since 2003?
----Twelve , including two women.
A.were sent B.sent C.have been sent D.have sent
---Who helped you clean the classroom yesterday?
---_______. I did it all by myself.
A.Someone B.Anyone C.Nobody D.Everybody
I remember ______ the math problem ______.But I can’t remember it’s answer.
A.working ;out B.to work ;out
C.working ;with D.to deal ;with
It’s said that _____ of the water around the world _____ polluted.
A.two third ;has B.two thirds ;have
C.two third ; are D.two thirds ;is
