题目内容
A．One year.B．Seven years.C．Four years.D．Six years.
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下列关于我国近年来PCT申请的表述中，错误的是（）。
已经开具的发票存根联和发票登记簿，应当保存5年，保存期满后即可销毁。()
听力原文：W: Did you go to the theater last Saturday？
M: Yes, I saw The Tea House. The acting was excellent.
What did the man do last Saturday？
听力原文：M: Hi, Miss White. Is Mr. Black in the office？
W: Oh, no. You just missed him. He left only a few minutes ago.
Who came last？
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