(a)   three books on the table.

I like that house. (a)   very big.

Look! (a)   a spider on the wall!

The students are doing (a)   homework.

My friends are outside. (a)   playing football.

(a)   two chairs in the kitchen.

Is (a)   a bathroom in your house?

(a)   is a ghost behind the curtain!

My neighbors have a dog. (a)   dog is friendly.

(a)   a TV in the living room.

The boys are in the park. (a)   playing basketball.

(a)   a clock on the wall.

Where is your sister? Oh, she's over (a)   .

The children are washing (a)   hands.

(a)   some apples in the basket.

(a)   a strange noise in the bedroom.

(a)   my parents. They're teachers.

(a)   are three windows in the classroom.

That's not my bag. It's (a)   bag.