What will our life be like by the year 2100? It’s difficult for US1.(imagine).People2.(live)on the earth for so many years.It is becoming more and more crowded and polluted.Maybe people will live on the other planet Mars.Astronauts 3.(not be)to Mars yet so far.Let’s imagine what our life will be like on Mars.I think life on Mars will be better than4.(those)on the earth in many ways.People will have more space.Robots will do most of work,so people will have more time for5.(hobby).What’s more,there will be no school on Mars.Every student will have a computer at home.They can study,do their homework and take exams online.
Why not ____ your teacher for help when you can't finish _____ the story by yourself?
A. to ask; write B. to ask; to write
C. ask; writing D. asking; to write
_________ volunteers will give out leaflets to ask people to protect the wetlands.
A. Two hundreds B. Hundreds of C. Two hundred of D. Hundred of
English isn’t as as Chinese.
A. easy B. easily C. easier D. easiest
I’ve never________to the Great Wall.
A. been B. gone C. seen D. come
—Have you mended your shoes, Bob?—Yes, I ____ them twenty minutes ago .
A. have mended B. had mended C. mended D. mend