--- What’re you going to do to protect the environment? --- Plant trees on       side of the river.

-- I don't know you take a bus to school.--Oh, I       take a bus, but it is raining heavily today.

---Dad, could I have an MP3 like this one ?---Sure, we can buy ________ one, but as good as this.

You should find a _______ chance to explain everything to your mother, because she’s still angry with you.

—Have you finished your homework yet?— No, I’ll finish it in ________ ten minutes.