读句子,选择正确的答语。 A. I live on the hill. B. They are playing hide-and-seek. C. It's a factory. D. It's next to(在……旁边)the zoo. E. Hi. 1.What are they doing? (________) 2.Where do you live? (________) 3.Where is your home? (________) 4.What’s this? (________) 5.Hi, Pingping. (________)