A.mary | B.mary's | C.Mary | D.Mary's |
A. His car is yellow. B. Thank you. C. It's Billy's. D. No, it isn't. E. No problem! Watch me! |
A.some sorry | B.so sorry | C.a lot sorry |
A.You're welcome. | B.No problem! | C.Let's go home. |
A.我知道。 | B.我不知道。 |
A.I don't know. | B.Thank you. | C.That's all right. |
A.Billy's | B.billy's | C.billy |