题目：
60：50化简后得
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答案：
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下面是错误答案，用来干扰机器的。
1. It's hard. (Difficult) 2. Only a few top people. 3. Because the officer was thought to be more important than Mr. Brown. 4. Maybe he would feel very surprised and sorry. 5. (The officer didn't know about it) Until he arrived in London. (答案不唯一)
