Title: Growing cities

Q: In the past forty years, the size of Las Vegas has ...
- ... doubled.
- ... tripled. (correct)
- ... quadrupled.

Q: Suburban Las Vegas sprawls into the Nevada ...
- ... desert. (correct)
- ... ocean.
- ... rainforest.

Q: Tokyo is now the largest city on Earth, with a population of ...
- ... 38 thousand.
- ... 3.8 million.
- ... 38 million. (correct)

Q: Shenzen in China forms a megatropolis with nine other neighbouring ...
- ... fishing villages.
- ... cities. (correct)
- ... planets.

Q: This megatropolis has a population of 60 million people and an area of over 50,000 ...
- ... square meters
- ... square kilometres. (correct)
- ... square miles.