Решение:
- 1. There are some chairs in the room. ('chairs' - множественное число).
- 2. There are three pencils and a pen here. (Существительное 'pencils' во множественном числе).
- 3. There is an apple on the plate. ('apple' - единственное число).
- 4. There are a book and three pens on the desk. (Сочетание 'a book and three pens' указывает на множественное число).
- 5. There are many pupils in the classroom. ('pupils' - множественное число).
Ответ: 1. are 2. are 3. is 4. are 5. are