hãy điền 1 giới từ để hoàn thành các câu sau::: 1.It's seven thirty and Minh is late ........ school ///// 2. David gets up ........... six fifteen every morning //// 3. We are ....... grade 12. Our classroom is ......... the 5th floor //////// 4. Bi and Fifi are ....... a bus. ///// 5. My mother is ......... home ///// 6. Mr. Trung ! Come .......... me please. /////// 7. They live ...... a house ............ 169 Baket street. /////// 8. There are some school things .......... the desk