Lesson 67 A puncture
Tom: Pump up this tyre, Sandy.
It's very flat.
Sue: What are you doing, Sandy?
Sandy: I'm pumping up this tyre.
Sandy: Whew! I'm tired.
Tom: It's still flat.
Tom: Let's take the tyre off the wheel.
Sue: Put the tube in this basin,Sandy.
Tom: Look at those bubbles.
There's a puncture in this tube.