31._____for 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.
---I’m terribly sorry for being late. My car broke down on the way. ---_______. I’ve just arrived .
Something else I’ve greatly enjoyed is working as _____ peer mediator, someone who helps _____ students to settle problems that they have with other students.
I didn’t know his address yesterday, otherwise I __________ him a visit.
Success is how you are viewed by others, _______ achievement is something you do yourself.
Jeremy Lin, _________ story is popular on the Internet, has attracted worldwide attention.