Miss li 什么about the food she has at lunch?

Miss li 什么about the food she has at lunch? at school,has lunch,Miss Li,usually(连词成句) She has the lunch at school 改为一般疑问句：She has lunch at about twelve She has lunch at the school canteen.改为否定句 She has lunch at school.[ 改为一般疑问句】 Miss Gao works in Beijing Miss Clark usually has( ) lunch at school.A./ B.the C.a she has lunch at home.改否定 She usually has lunch (at school)? She has lunch at twenty t( 3 )twelve at school.In the aftern 选择：LI ___ go to the market to buy food because she has got a She has lunch at school at twelve.这个at在这什么意思,in at on用在什么情况?