使用Are these/those...?进行问答 — 英语填空题
题目
阅读下面的对话，在空位处填入合适的单词，使对话完整、通顺。（每空一词）
Amy: Welcome to my farm, Sam!
Sam: Thank you. Wow, look at the animals over there. ___ these pigs?
Amy: No, they ___. They are cows.
Sam: Oh, I see. Are those horses?
Amy: Yes, they ___.