Some people fear that ________ air pollution may bring about changes in _______ weather around the world.
| A．/; the | B．the; / | C．an; the | D．the; a |
--Lily did succeed at last!
--Yeah, indeed, but she was ________ than successful, I think．
| A．more lucky | B．much luckier |
| C．luckier | D．lucky |
“Well done, John! Not a single mistake ________ in your exam paper this time!” said the teacher．
| A．you made | B．did you make |
| C．had you made | D．you have made |
--Are you going somewhere during the winter vacation?
--Yes, I’ve found a nice beach ________ I can enjoy swimming even in February．
| A．that | B．when | C．where | D．which |
They were ahead during the first half of the match, but they ________ in the last five minutes．
| A．were beating | B．beat |
| C．were beaten | D．had been beaten |
________ 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 |