填介词:Tom lives ____ the fifteenth floor.1.at 2.on

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填介词:Tom lives ____ the fifteenth floor.1.at 2.on
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填介词:Tom lives ____ the fifteenth floor.1.at 2.on
填介词:Tom lives ____ the fifteenth floor.1.at 2.on

填介词:Tom lives ____ the fifteenth floor.1.at 2.on
2
表示第几楼,用介词on

选2

选2,on. On 表示表面接触,住在15楼,你就那样想,脚和地需要接触,呵呵~

2.on