---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

---May I have a look at your plan for the robot ?

----Sorry ,I’ve _____ it at home .

A.missed      B.forgotten       C.left      D.lost

----Which of the two pairs of shoes will you take ?

----I’ll take _____ .They are too small for me.

A.both           B.all           C.either         D.neither

—What about playing football this afternoon, Sam?

—I would rather       at home than       football. It’s too hot outside.

A.stay; playing B.stay; play

C.to stay ; to play D.to stay; playing

The cleaners make a great contribution to _____ the city clean.

A.kept B.keeping C.keep D.be kept

He is a writer _____ a singer.

A.as long as  B.as well C.as soon as D.as well as