Từ câu 40 đến câu 44, đọc kĩ đoạn văn dưới đây rồi trả lời câu hỏi:

Linh is twelve years old . He is in grade 6. He lives in a house with his mother, father and sister. Their house is next to a bookstore. In the neighborhood, there is a restaurant, a market and a stadium. Linh’s father works in a restaurant. His mother works in a market. Linh goes to school every morning . He has classes from seven to fifteen past eleven.

Which grade is Linh in?