A crazing. B resisting. C rushing. D arranging.

A complicated. B low. C obvious. D intimate.

A their friends are indulged in smartphones. B their parents don't care for them. C they prefer staying at home. D they may be suffering social pressure.

A makes criminologists feel happy. B may indicate happier teenagers. C reveals teenagers'anti-social behavior. D encourages broader drug dealing.

A works efficiently in the market. B has fluctuated in the late night. C is criticised by both consumers and economists. D will cause catastrophe during emergencies.

A a fall ofprice in electricity market. B excessive charge ofmoney on motorway tolls. C a balance between supply and demand. D a rise ofprices on low-tech necessities.

A protest. B resent. C oppose. D exclude.

A the elegance and attraction of cars. B a rush of demand in some areas. C richer users'willingness to pay extra money. D a short supply ofgood altematives.

A supportive. B critical. C indifferent. D subjective.

A The Climate Change committee advised the govemment to increase it. B More efficient devices demanded more energy. C The sustainable approaches are paid partly by the British. D New windfarms are built to meet the UK's carbon targets.