单项选择题 M: Did you find what you wanted? You’e been gone all afternoon.W: I looked all over town, but couldn’t find any bookcases on sale. They’re so expensive. I guess I’ll wait a while longer.Q: What is obvious from the conversation?（）

单项选择题 承包商为赶工期，向水泥厂发函紧急订购500t某强度等级的水泥，要求三日内运送至工地，并要求当日承诺。承包商的订购行为（）。

单项选择题 W: Would you mind my visiting your class tomorrow morning, Professor Smith?M: No, not at all. But I don’t have classes tomorrow morning. Perhaps you can go to my class on Friday morning.Q: What do we learn from the conversation?（）