Quiz · Cleaner Air for the City

Question 1What is the main idea of the whole passage?

Why schools in the city closed last winter The history of buses in a busy city centre A mother's morning walks through the streets How a city is improving its dirty air

Question 2Where did most of the city's pollution come from?

Old buses and heavy lorries Factories outside the city centre Smoke from family home heating Trees planted along main streets

Question 3How many trees have been planted along the main streets?

More than a thousand Exactly one hundred About five hundred Nearly ten thousand