A.Sorry. I can't help you. | B.Excuse me. |
A.This is a cat. | B.Here's a dog. |
A.in | B.on | C.at |
A.Thank you. | B.Goodbye. | C.You're welcome. |
A.to | B.in | C.for |
A.are; at | B.is; in | C.are; on |
A.You're right. | B.You're welcome. | C.Thank you. |
A.Sorry. | B.Excuse me. | C.Pardon. |