change to the purple as in the example: пример: it is a pen.-they are pens. 1.it is a cow. 2. it is an apple. 3. she is a girl. 4. he is a child. 5. it is a doll. 6. it is a glass. 7. it is a dress. 8. he is a teacher.9. it is a bicycle. 10.he is a man.

в данном случае существительное glass употребляется в ед.ч. так как стекло в анг.яз нельзя сказать "стекла" у самой опыт есть, 2 года проучилась в английской школе

They are cowsThey are applesThey are girlsThey are childrenThey are dollsThey are glassesThey are dressesThey are teachersThey are bicyclesThey are men