根据句意，用所给单词的适当形式填空。Columbus made the ___________ (discover)of the new land.
The __________mother thanked the policeman again. (thank)
We should stop using p___________ bags to protect the environment.
Last night his _________ (ill) kept him awake.
Between the two buildings __________ (be) a tall tree.
—Dad, must I finish my homework today?
—No, you ______. You may do it tomorrow.
| A．needn’t | B．mustn’t | C．don’t | D．won’t |
—What ______ the number of the students in your school?
—About two thousand. A number of them _____from England.
| A．is; are | B．is; is |
| C．are; is | D．are; are |
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 |
There is going to be a wonderful party __ the evening ___October 1st, 2009.
| A．in, of | B．on, on |
| C．on, of | D．for, on |
My son want a pet rabbit for long, but I have no time to buy ______ for him.
| A．it | B．that | C．the one | D．one |