Помогите поставить во множественное число,пожалуйста

  • Напишите следующие предложения во множественном числе:

    1. There is a book on the table.
    2. I will read this book in some years.
    3. A laboratory assistant works in the institute.
    4. A boy has a new ball.

  • 1. There( is/are) (a book/ books) on the( table/tables).
    2. (I /we) will read( this/those) (book/books) in some years.
    3. (A laboratory assistant / laboratory assistants ) (works/work) in (the institute/ institutes).
    4. (A boy/ boys)(has/have )(a new ball./new balls)