—____ the workers are very tired, _____they keep on working. — They are great. We must learn from them.

－Can I use your bike this afternoon?_______ is under repair.－No problem. Here’s the key.

—Have you brought        with you? We won’t have time to come back.—Don’t worry. All the things we need are here, in this big bag.

—Look ,that’s Mike,your classmate. --Yes,Let’s go and say hello to_________.

 —Is this camera mine? —No, it isn’t________. It’s________.