-Where's Amy7
-I'm not sure. She ____ be in the laboratory
| A．might | B．can |
| C．must | D．should |
．People have planted a lot of trees and grass in order to ____ wind and sand in the desert．
| A．hold down | B．hold up | C．hold back | D．hold out |
Read the passage and correct the mistakes, ______．
| A．if not | B．if any | C．if ever | D．if never |
——Could I use your English dictionary for a few moments?
—— ________．I’m not using it myself．
| A．Come on | B．It depends | C．Go ahead | D．That’s great |
_______ enough is quite necessary for your health, so you shouldn’t stay up too late every day.
| A．Sleep | B．Sleeping | C．To sleep | D．Having slept |
.Most of the citizens didn’t know what had________just now.
| A．come through | B．come into | C．come along | D．come about |