根据句意,用括号内所给单词的正确形式填空。
1. Where ________ (be) my video tapes?
2. Excuse me, Jane. Is it ________ (you) watch?
3. Are those his _____ (baseball)?
4. —Are the books in the bookcase?—Yes, _______ (it) are.
5. Jim, can you bring two ________ (bag) to me?