---People, especially teens, think it_______ great fun to surf on________ Internet.
--- I agree with you.
| A．a; the | B．a; / | C．/; the | D．/；/ |
There are ________ students waiting in the hall, ________?
| A．hundreds of; aren’t they | B．four hundred; aren’t they |
| C．four hundreds; aren’t there | D．hundreds of; aren’t there |
You should keep the window _________ because the room is so hot and damp.
| A．open | B．closed | C．opened | D．close |
If you don’t know the word, you can _________ in the dictionary.
| A．look it after | B．look it up | C．look for it | D．look at it |
It is not ______ that everyone will be able to be famous persons.
| A．right | B．good | C．realistic | D．impossible |
They ________ often _______to be careful before _______the road.
| A．are, told, cross | B．are, told, across | C．are, telling, crossing | D．are, told; crossing |