Who do you write to?
A．want B．want to C．to
—People have realized how important the environment is, but still trees ____in the world every year.
— We must do something to stop it.
| A．were cut down | B．cut down |
| C．are cut down | D．will be cut down |
Do you know _____?
| A．where is he from | B．who is he |
| C．how old is he | D．how much the jeans are |
There is _____ knocking at the door. Go and see who it is.
| A．nobody | B．anybody |
| C．everybody | D．somebody |
—What was your hometown like five years ago?
—It _____ very old and dirty.
| A．used to be | B．was used to being |
| C．is used to being | D．used to being |
I won’t take part in the party _____ Joe invites me..
| A．if | B．when | C．because | D．unless |