Task 2. Fill in the gap. (is /are)

There …..a book on the desk.
There …..pencils in the pencil case.
There ….a teacher in the classroom.
There …..20 classrooms in the school.
There …..2 houses in the street.​

Ответ: there is a book on the desk.

There are pencils in the pencil case.

There is a teacher in the classroom.

There are 20 classrooms in the school.

There are 2 houses in the street.

Объяснение: пиши are во множественном числе и is в единственном:

There is a house in the street.( a house - единственное число)

There are 10 houses in the street.(houses - множественное число)

Удачи в учебе!