A、 Piracy is an easy thing to commit.
B、 Invention usually needs heavy cost.
C、 Patent is useful but not practical.
D、 Inventions are difficult to spread.

【正确答案】 A

【答案解析】解析：女士开头就表达了自己的疑惑：因为任何人都可以复制和销售某种发明，发明者怎么赚钱呢?A是对她困惑的原因的同义表达。

A、 Solve the conflicts privately with the inventor.
B、 Give the inventor some compensation.
C、 Buy the patent from the real inventor.
D、 Give all the fake commodities to the inventor.

【正确答案】 B

【答案解析】解析：B中的compensation是明确听到的，就是答案。通过预读选项，根据动词原形及宾语中的inventor可知，动作发出者应该是“盗版者”。注意听提及的其他人的动作。

A、 To encourage the inventors to go to civil courts.
B、 To make sure the patent is valid for 20 years.
C、 To have an agreement with the inventors.
D、 To earn money from the invention.

【正确答案】 B

【答案解析】解析：选项都是不定式短语，可见题目问目的或原因。男士说世贸组织已经达成一个与贸易有关的知识产权协议，旨在确保专利的有效期是20年，故选B。

A、 The inventor decides who the expired patent goes to.
B、 The inventor may strive for a longer valid time span.
C、 The inventor will try hard to sell his products faster.
D、 The inventor will hesitate when giving his data to the public.

【正确答案】 C

【答案解析】解析：关键是抓听到对话末尾男士提到的inventors make and sell goods faster，选项C是其近义改写。