问题描述：
请帮助英语病句改正
1.our classroom is under second floof.
2.how many computer are there in your school?
3.welcome in our school.this way,please.
4.do you have the lunch at school?
1.our classroom is under second floof.
2.how many computer are there in your school?
3.welcome in our school.this way,please.
4.do you have the lunch at school?
问题解答：
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