________ global temperatures rising, the UN Climate Change Conference was held in Cancun（坎昆）, Mexico last year．
| A．Prevented | B．Preventing |
| C．Having prevented | D．To prevent |
Nine in ten parents said there were significant differences in their approach to educating their children compared with ______ of their parents．
A．those B one C．both D．that
The fact that people are afraid to go out at night is often a result of perceived (感知) danger ________actual danger.
| A．other than | B．more than | C．rather than | D．better than |
Mother told Jim to watch the milk until it boiled and then _________ off the gas.
| A．turn | B．turning | C．turned | D．having turned |
The idea puzzled me so much that I stopped for a few seconds to try to _______.
| A．make it out | B．make it off | C．make it up | D．make it over |
With exports ______ a big role in its economic growth, China has been affected by the current financial storm.
| A．playing | B．to play | C．played | D．play |