You should make an ____ plan in case anything unexpected happens.
| A．active | B．alternative | C．convenient | D．economic |
—How about ________ job you were offered last week?
—Not so bad, but I ran into difficulties at the very beginning.
| A．the | B．an |
| C．a | D．不填 |
________ freezing snow, which is still heavy, will come to ________ end this weekend.
| A．/; an | B．The; / |
| C．The; an | D．An; the |
If we do not deal with ________ problem caused by air pollution, our planet may no longer be ________ healthy place for us.
| A．a; the | B．a; a |
| C．the; a | D．the; the |
Xi'an，________ city of natural beauty will host ________International Horticultural (园艺) Exposition in 2011.
| A．a; the | B．an; a |
| C．the; a | D．an; a |
As is known to all, ________ opening ceremony of the 16th Asian Games held on November 12th in Guangzhou was ________ great success.
| A．不填；a | B．the; a |
| C．the; 不填 | D．a; 不填 |