We must do everything we can _____ our earth cleaner and safer.
| A．made | B．to making |
| C．make | D．to make |
He to New York two weeks ago, and he there three times.
| A．has gone; has been | B．went; has been |
| C．went; was | D．was going; went |
Why not your teacher for help when you can’t finish it by yourself?
| A．ask; write | B．to ask; writing |
| C．ask; writing | D．asking; write |
the teachers in their school is about 200 and one fourth of them are teachers.
| A．A number of; women | B．A number of; woman |
| C．The number of; women | D．The number of woman |
World Expo 2010 Shanghai China people from all over the world to the theme “Better City, Better Life”.
| A．attended | B．attracted | C．allowed | D．advised |
“Where’s Li Hua?” “Look! He tennis on the playground.”
| A．plays | B．played |
| C．was playing | D．is playing |