Beijing government puts more than 700 million yuan to increase its green space this year; ____________ doubles the money provided last year.
| A．as | B．while | C．that | D．which |
—Did you see who the driver was?
—No, so quickly ____ that I couldn’t get a good look at his face．
| A．does the car speed by | B．did the car speed by |
| C．the car sped by | D．the car speeds by |
____ a strong and fair climate agreement at the key UN summit in Copenhagen, 50,000 people in London wore blue and went to the streets．
| A．Call for | B．Calling for | C．To call for | D．Called for |
It is the test system, rather than the teachers, ____ is to blame for the students' heavy burden nowadays．
| A．who | B．this | C．that | D．whom |
Many children are ____ in the countryside when their parents flood into the cities for jobs．
| A．left behind | B．left off | C．left aside | D．left out |
The UN officials say it could be many weeks and even months ____ a deal is reached．
| A．before | B．after | C．when | D．as |