Lisa:
Well, if we fold the sides of the paper so that it forms a cylinder or tube that would keep the ball from rolling onto the floor. This would also help keep the bridge rigid enough to span the distance between the tables. What do you think Bill?
Bill:
I think that's a brilliant idea. If necessary we could use the drinking straws to further reinforce the structure.
Omar:
Do you think 10 cm strips would be wide enough? What’s the diameter of a ping-pong ball?
Lisa:
That’s a good question Omar. I don’t know maybe two and a half centimetres OK what about 15 cm?
Vocabulary for IELTS