In autumn, many green ________ change toyellow, orange or red.

international market, the price of petroleumhas been falling down, which is now _____ it used to be

Thank you for sharing your ruler with me.— That’s what friends are for.

Do you remember the old man _____ a big dog- Yes. I was afraid of it when I passed his house.

The building whose gate is _____ stands______ to my school