Choose the best answer A, B, C, D to complete the sentence.

Fossil fuels are very common in our society but they _________ the environment.

Listen and fill in the blank with one suitable word.

Never before in history, have there been so many people on Earth as right now. Our numbers have skyrocketed from 1 billion in 1800 to 2.3 billion in 1940, 3.7 billion in 1970 and 7.4 billion in (1) _______. The world population (2) _______ fourfold in the last century, so what can we expect for the next century? And what does population growth mean for our future? Will there be mass-migration? (3) _______ slums and megacities covering continents? Diseases and pollution? Chaos and violence over energy, water, and food? And a human species focused only (4) _______ sustaining itself? Will population growth destroy our way of life? (5) _______ is this prophecy just ungrounded panic?

Find the word which has a different sound in the part underlined.

Find the word which has a different sound in the part underlined.

Find the word which has a different sound in the part underlined.

Choose the word which has a different stress pattern from the others.

Choose the word which has a different stress pattern from the others.

Choose the word which has a different stress pattern from the others.