1. My sister is reading in her room. (就划线部分提问)
    ______ is ______ sister ______ in her room?
2. You can use my bike. (改为否定句)
    You ______ ______ my bike.
3. This is my favourite shop. (改为同义句)
    I ______ this shop ______.
4. He is passing the big store. (用often 改写句子)
    He ______ ______ the big store.
5. Mary is borrowing books in the library. (就划线部分提问)
    ______ is Mary ______ books?