对于每个单元格，背景色基于当前的列号。
For each cell, the background color is based on the current column number.
他们把帕格喝酒和垂头丧气归结为失掉“加利福尼亚号”的缘故。
They had ascribed Pug's boozing and his depression to his loss of the California.
可选择超过一个科目，请于适当的格内加入“（” 号。
You may choose more than one subject, Please put a "(" in the appropriate box(es).
撇号用来表达所有格。
撇号用来表达所有格。
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