All the students are back ____ home.A.to B.at C./

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All the students are back ____ home.A.to B.at C./
All the students are back ____ home.A.to B.at C./

All the students are back ____ home.A.to B.at C./
选A.to
back为形容词,"回来"
home在这里做名词
be back to home 回家

选择C

C home前面不能用介词，除了at home那为什么不能选B?back to +某地是固定短语，没有back+at+地点的用法，这个是固定短语，而且home在这里做的是副词，是修饰back的。可以说back to school ，怎么不能说back to home？解释的再专业点在这里home是副词，前面不能加介词，介词+名词的构成可以看做是一个副词，前面back是形容词，在这里home修...

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C home前面不能用介词，除了at home

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back to school 是固定格式
back home 也是固定格式
别钻牛角尖了 - -！

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