Oraciones con sustantivos contables y no contables con there isny there are?

There are some students in the classroom

There are lot of windows in our classrooms

There are apples in the box

There are five flags at the top of the hotel

There are two students absents today

There is an orange on the table

Is there a pencil on the desk?

There is a car on the road

There is a lamp in my bedroom

There is an ipad in my bag.