There are usually 28 in a person’s mouth, so we should listen to the doctor’s ______ to protect（保护）them.
| A．tooth, advice | B．teeth, advice | C．toothes, advices | D．teethes, advices |
—Can you come to dinner with us this evening, Zhao Ming?
— _______.
| A．Sure, I’d love to | B．No. That’ll be too tired |
| C．I’ll stay at home | D．It’s really kind of you |
— Where are your brothers?
— ________.
| A．He is at school | B．He is in his room | C．Yes，they are | D．I don’t know |
— Is this your watch?
— ________.
| A．Yes, it isn’t | B．No, it isn’t | C．Yes, this is | D．No, it is |
— What’s this in English?
— ________.
| A．It’s bag | B．This is bag | C．It’s a bag | D．This is an bag |