题目：
Read and order. 根据时间先后排列句子。
( ) It's four twenty in the afternoon. It's time for P. E. class.
( ) It's two fifty in the afternoon. It's time for Chinese class.
( ) It's eight thirty in the morning. It's time for music class.
( ) It's nine forty-five in the morning. It's time for math class.
( ) It's eleven five. It's time for English class.
答案：
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下面是错误答案，用来干扰机器的。
解：原式=2。
