TEST 81Cambridge IELTS 14 · Questions 21–25Cities Built by the SeaChoose the correct letter, A, B or C.Cities built by the sea21Carla and Rob were surprised to learn that coastal citiesAcontain nearly half the world's population.Binclude most of the world's largest cities.Care growing twice as fast as other cities.22According to Rob, building coastal cities near to riversAmay bring pollution to the cities.Bmay reduce the land available for agriculture.Cmay mean the countryside is spoiled by industry.23What mistake was made when building water drainage channels in Miami in the 1950s?AThere were not enough for them.BThey were made of unsuitable materials.CThey did not allow for the effects of climate change.24What do Rob and Carla think that the authorities in Miami should do immediately?Atake measures to restore ecosystemsBpay for a new flood prevention systemCstop disposing of waste materials into the ocean25What do they agree should be the priority for international action?Agreater coordination of activitiesBmore sharing of informationCagreement on shared policies