单选题,麻烦详细讲解下,最好每个答案都讲解下,谢谢1. My bicycle_____down just when I need it most. A, always breaks B, always broke C, is always breaking D, has always broken答案：C不明白这里为

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单选题,麻烦详细讲解下,最好每个答案都讲解下,谢谢1. My bicycle_____down just when I need it most. A, always breaks B, always broke C, is always breaking D, has always broken答案：C不明白这里为
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单选题,麻烦详细讲解下,最好每个答案都讲解下,谢谢1. My bicycle_____down just when I need it most. A, always breaks B, always broke C, is always breaking D, has always broken答案：C不明白这里为
单选题,麻烦详细讲解下,最好每个答案都讲解下,谢谢
1. My bicycle_____down just when I need it most.
A, always breaks B, always broke
C, is always breaking D, has always broken
答案：C
不明白这里为什么用进行时，谁能解释下，谢谢

单选题,麻烦详细讲解下,最好每个答案都讲解下,谢谢1. My bicycle_____down just when I need it most. A, always breaks B, always broke C, is always breaking D, has always broken答案：C不明白这里为
C
我的自行车老是在我最需要它的时候坏掉.

单选题,麻烦详细讲解下,最好每个答案都讲解下,谢谢1. My bicycle_____down just when I need it most. A, always breaks B, always broke C, is always breaking D, has always broken答案：C不明白这里为 麻烦讲解下 只要计算答案.最好讲解下. 详细讲解下光合作用. 麻烦你在给我详细 讲解下 麻烦详细讲解下红笔勾画部分 选哪个?麻烦讲解下~ 有答案也不理解,谁能详细讲解下. 对不,最好讲解下 第二题麻烦给我讲解下. 问题在图中、麻烦讲解下、 讲解下, 讲解下. 最好有讲解下,最好是图. 球单调性怎么个求法（高一数学） 最好有例题讲解下 化学有机选择题一题,麻烦详细讲解下,有图 如何根据设备的功率计算强电线缆的大小?麻烦大大详细讲解下, java.util.Date用法麻烦详细讲解下java.util.Date的用法,谢谢、、