---What’s Mother doing, Jim?
---I don’t know. She ________Zhou Libo’s show at her bedroom.
| A．may be watching | B．must be watching | C．is watching | D．should watch |
There __________ still some milk in the fridge. It’s not necessary to go to the store today.
| A．am | B．is | C．are | D．be |
—__________ T-shirt do you like better, the red one or the blue one?
—I prefer the red one.
| A．How much | B．How many | C．Whose | D．Which |
Your English teacher has never lost his temper, ___________ he?
| A．has | B．hasn’t | C．did | D．didn’t |
You had better ____________ because you have to drive back home.
| A．not drinking | B．not drink | C．don’t drink | D．not to drink |
As we all know, it’s not polite to keep others _________ for a long time.
| A．wait | B．waited | C．to wait | D．waiting |