听句子,选择正确答语.每个句子读一遍。 (     )1. A. Because they're our friends. B.Because they're dogs. C.Because we don't have animals. (     )2. A.Next year. B.In 1921. C.In the future. (     )3. A.It's beautiful. B.I hope not. C.Yes, they did. (     )4. A.That must be fun. B.Do you think so? C.I'm sorry to hear that. (     )5. A.I agree with you. B.Nothing. C.It looks like a plate.