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根據首字母或漢語提示寫單詞,完成句子。
1. Your book is u_____ the desk.
2. My books are on the c_____.
3. —Where is your pen?
    —Sorry, I don't k_____.
4. Can you b_____ your notebook to school?
5. I n_____ a bag.
6. His notebook is in the _____ (抽屜).
7. Cindy's _____ (數學) book is on the bed.
8. Is the notebook on the _____ (沙發)?
9. My pencil is on the _____ (課桌).
10. Here is your brother's _____ (房間).

根據句意和首字母提示完成單詞。