29. About one in ten computer game players show signs of addictive behavior that have negative effects on their family, friends and school work , according to a new study.
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.