--- Whose backpack is this?
--- It be Mary’s. She is looking for hers.
| A．can | B．must | C．may | D．can’t |
-- I don’t know ______ with this problem. It’s too hard.
--- You can ask Mr Wang for help.
| A．which to deal | B．when to deal | C．what to deal | D．how to deal |
I used to go to sleep ________ my bedroom light ________.
| A．with, open | B．with, on | C．and, open | D．in, on |
—There is ____ time. You don’t need to hurry.—But I want to see her as early as possible.
| A．little | B．plenty | C．a lot | D．plenty of |
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 |