用所给单词的适当形式填空。
1. —Where ________ (be) the notebooks? —They are in the backpack.
2. Look! The ________ (key) are under the desk.
3. Jim, please ________ (take) these things to your brother.
4. Can you ________ (bring) some video tapes to David?
5. They need ________ (answer) these questions in English.
6. Here ________ (be) my room. My books ________ (be) on the desk.
