—I’m very tired these days because of walking to school every day.—________ useful exercise you are taking! It can help you keep healthy.
--, Grace , is this your pencil? --Yes, thank you.
---schoolbag is green, and is black. ---OK, Here you are.
clock and English book are on the computer desk.
---Is my hat on your bed, Cindy? --- .And your jacket is here, too,
---Where are their keys? ---They are .