Ответ:

- There are two students.

- There is a teacher.

- There are two desks.

- There is a book.

- There is a blackboard.

- There are two chairs.

- There is a ruler.

- There are two pencils.

- There is a rubber.

- There is a world map.

Объяснение:

There is используется с существительными в единственном числе, например:

There is a book. — Есть книга. Книга одна, поэтому употребляем there is.

There are нужно, если предметов несколько, например:

There are two pencils. — Есть два карандаша. Карандаш не один, их несколько (два), значит, правильный вариант — there are.

Объяснение:

There are two students

There is a teacher

There are two desks

There is a book

There is a blackboard

There are two chairs

There is a ruler

There are two pencils

There is a rubber

There is a world map