问题描述：
填介词
1.Many boys' first work experience is ____ the reataurant industry.
2.____ a discount up to 25%,he spent far less moeny on the computer.
3.The restaurant is famous for west lake fish ____ vinegar,fried chrimps with Longjing tea.
1.Many boys' first work experience is ____ the reataurant industry.
2.____ a discount up to 25%,he spent far less moeny on the computer.
3.The restaurant is famous for west lake fish ____ vinegar,fried chrimps with Longjing tea.
问题解答：
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