单项选择题 A．By studying the pictures of them.B．By studying the written material of them.C．By examining them and the tools used to build them.D．By examining the structure of them.

单项选择题 听力原文：W: I'm told The Seven Swords just finished its last cut.M: Yes, it will be a hit, I think. When will it be on, do you know?Q: What are they talking about?(16)A．A film.B．A book.C．A fencing match.D．A popular singer.

多项选择题 地下铁路路网的基本类型有蛛网式和（）。