Помогите с английским. Переделать предложения во множественном числе.

1 His reports aren't ready yet.
2. Are there mice under the bed(s)?
3. High mountains are very cold at the top(s). 
4. There are large windows in the classroom(s).
5. There are many holidays (these months). 
6. These flowers are very beautiful. 
7.  My feet are tired. 
8. There are parties these weekends. 
9. Those are large boxes. 
10.These are expensive watches.