用所给单词的适当形式填空。 1. ______ (he) books are in the bookcase. 2. These______(be) my rulers. 3. Are those ______ (she) oranges? 4.I ______ (not know) his name. 5. Where______(be) my keys? 6. Are these your ______(photo)? 7. The ______(pencil) are on the table. 8. ______ ( be) the computer game on the chair?