— ________ useful tool the computer is! — I agree. It’s ______ interesting as well.
These natural disasters have warned us that everyone should start to protect the_____ immediately.
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.