后一句正确,介词at 后通常不加定冠词the,at school,at farm,at station,at home,at night,in the school ,in your school,in the night,
on my uncle's farm,etc.
后一句正确,介词at 后通常不加定冠词the,at school,at farm,at station,at home,at night,in the school ,in your school,in the night,
on my uncle's farm,etc.