问题描述：
为什么by the car不对?
1．He goes to work by the car.
2．He goes to work by his car.
3．He goes to work in his car.
为什么1和2不对?3对呢?
1．He goes to work by the car.
2．He goes to work by his car.
3．He goes to work in his car.
为什么1和2不对?3对呢?
问题解答：
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