题目内容:
Questions 13 to 15 are based on the conversation you have just heard.
A.They had to stay in Denver for two days. B.They missed seeing the Grand Canyon.
C.They started out on the wrong highway.
D.They almost didn't see Indian Falls.
参考答案:【答案仅供学习,请勿对照自行用药等】
答案解析: