--- Where ___________ your pen pals from?--- The United States.
My teacher is very young. He ________ medium height.
–Hi. How is it going? --__________.
There are many people in the park. Some are walking along the lake. _________ are sitting on the grass.
Next to the school _________ a house __________ an interesting pool.
Mary sits _________ the classroom and I sit _________ her.