It is an easy arithmetic 30.
答案：(A) question
arithmetic question（算術問題）為固定搭配，指前述50元及300元的價差問題其實是簡單的算術題；feedback／product／industry 均不符合 arithmetic 的搭配語意。
前一句才剛出現過 feedback，眼睛還停在那個字上，很容易順手把它填進來。答對率五成二。
空格前面是 arithmetic（算術的），要問的是「算術的什麼」。an arithmetic question（一道算術題）是常考的字詞搭配，同義的說法還有 an arithmetic problem。四個選項裡只有 question 與 arithmetic 搭得起來，同句就選得出答案。下一句可以再驗算一次：街上 NT$50 就買得到的 CD，為什麼要花 NT$300 以上買同一張？這正是一道算術題。鑑別度高達 54，分開的是兩種讀法：把 It 讀成單純回指前一句的人，順手選了剛出現過的 feedback；看出這一句是在替下一句那道價差算式起頭的人，選了 question。
feedback（回饋）：前一句才出現過，但「一個簡單的算術回饋」講不通，它與 arithmetic 搭不起來。product（產品）：唱片是產品沒錯，但在數學裡 product 指的是「乘積」，與這裡要說的「一道題目」是兩回事。industry（產業）：與 arithmetic 完全無關。
an arithmetic question（一道算術題）、an arithmetic problem（一道算術題，同義說法）、solve a problem（解決問題）、spend ＋ 金錢 ＋ on（把錢花在……上）、the same one（同一個）、feedback（回饋，不可數名詞）。
Many entertainment celebrities, on April 5, 2002, attended an anti-piracy demonstration in Taipei. The purpose of the rally was to ask fans to respect the copyright and to stop buying 26 CDs. Although the intellectual property right is to be protected by law, the fans may think otherwise.
Obviously, it is the recording industry that wants to 27 piracy. Celebrities in the rally probably have no idea about how much a CD of their music albums costs. After signing million-dollar contracts with recording companies, singers devote most of their time 28 their music perfect while companies are busy commercializing their products.
It is the fans that support the kingdoms of the recording companies; 29, the industry never gives its feedback to the fans—by lowering the prices of CDs. It is an easy arithmetic 30. When one can buy a CD of pop music for NT$50 anywhere on the streets, why does he or she want to spend NT$300 or more for the same one?