I. Rewrite these sentences into passive form of modal verbs. (Chuyển các câu sau sang thể bị động của động từ khiếm khuyết ) 1. Mary can do this math problem in a minute.  This math problem......................................................................................................................... 2. They can reuse glass bottles.  Glass bottles................................................................................................................................... 3. People should not enter this area tomorrow.  This area ........................................................................................................................................ 4. They can make cheese from milk.  Cheese ........................................................................................................................................... 5. Students can borrow books from the school library.  Books ............................................................................................................................................ 6. People can use vegetable matter to make compost.  Vegetable matter ........................................................................................................................... 7. You must not wash this dress with hot water.  This dress....................................................................................................................................... 8. She will pick you up at 9 a.m. tomorrow.  You ................................................................................................................................................ 9. We can‟t wear jeans at school.  Jeans .............................................................................................................................................. 10. How can adults learn English ?  How ...............................................................................................................................................