a. at two. b. at about four. c. at about six. a the c. the,a. a pet pig. b. a pet cat. c. a pet dog.16. whose house did the hole lead to(通向)?a. b. c.从a、b、c、d四个选项中选出可以填入空白处的选项,b. snakes usually sleep in winter.听第一段对话,初三英语上册期末试卷, dead d. death,a. the,a. she