At the Copenhagen conference, all the countries were called on to do all they could to control greenhouse gas emissions it was too late.
| A．when | B．after | C．until | D．before |
–You have just 15 minutes to get to the airport.
–All right. I guess I can ______.
| A．do it | B．make it | C．finish it | D．get it |
The poor little boy ______ by his heartless parents was seen begging in the street.
| A．abandoning | B．to be abandoned |
| C．having abandoned | D．abandoned |
–I was wondering if we could go skiing on the weekend.
–______ good.
| A．Sound | B．Sounded | C．Sounding | D．Sounds |
The house rent is high. I've got about half the space I had at home and I'm paying ______ here.
| A．three times much as | B．as much three times |
| C．much as three times | D．three times as much |
______ we have enough evidence (证据), we can't win the case.
| A．Once | B．As long as | C．Unless | D．Since |