The old man lives ____ in the countryside, but he doesn’t feel_____ because he chats with his children on the Internet every night.

Which is ____________, the telephone, the computer or the light bulb?

The boy ___________ exercises, so he has to see the doctor because of overweight.

---________ do you water these flowers?   --- Once a week.

Of the two T-shirts，I’d choose the ___one to save some money for a book.