—Are there any balls under the chair?   —________.

---There is a book ________ on the ground.---Let’s ________ and ask who lost it.

It takes me two hours ______ my homework every day.

—Is this your pencil?—No, ________. It’s his pencil.

—Excuse me. _______ is your pen pal from?—He’s from Australia. We have been pen friends for three years.