Better English

1. involved2. Find out what the greatest cyber threats to a company are, and what is being done to deal with them.3. (i) F (ii) T (iii) NG4. A 
1. B 2. 30 billion tonnes of trapped carbon 3. A dangerous amount of greenhouse gases would be released into the atmosphere. 4. (i) T (ii) NG (iii) F
1. pollution/air quality 2. reducing 3. particulate matter/ nitrogen dioxide/ ozone (any 2)
1. act/work very quickly 2. (i) stumbled upon (ii) carnage (iii) aground 3. C 4. She tried to move them upright so they could breathe more easily.
1. (i) coveted (ii) brisk (iii) a stone's throw away (iv) remote (v) prohibits 2. the food truck 3. by lottery/draw
1. They might die young 2. The study showed that antioxidant pills can upset the body’s stress-response mechanism and make young people age more quickly. 3. It can damage cells in a process similar to the rusting of metal.
1. namesake 2. Cantonese opera 3. The beautiful costumes and headwear.
1. (i) pessamists  (ii) opposite (iii) positive 2. negative/pessamistic 3. thinking /perceiving /reasoning 4. the interaction of personality and mood 
1. The alpine fault, where the Australian and Pacific (tectonic) plates meet 2. i) vaguely       ii) blasé about    iii) seismic 3. Every year, dozens of top international geologists head there to study the geological fault.