----Where is my watch? I can’t find it.----Don’t worry. It must be ______ in your room.
There __________ still some milk in the fridge. It’s not necessary to go to the store today.
—__________ T-shirt do you like better, the red one or the blue one?—I prefer the red one.
Your English teacher has never lost his temper, ___________ he?
You had better ____________ because you have to drive back home.
As we all know, it’s not polite to keep others _________ for a long time.