Make the sentences interrogative with what,
where, how many, when 

1. There (is, are) a large desk in my room.

2. There (is, are) two windows in my classroom.

3. There (is, are) two beds in my parents' room.

4. There (was, were) a letter in my bag.

5. There (is, are) two pens on my table.

6. There (was, were) two armchairs in this room.

7. There (is, are) a blackboard, ten tables and
nineteen chairs in our classroom.

8. There (was, were) ten students at the lesson
yesterday.