is true friendship is that he or she would like to do all she can his or her friends when they are in trouble.
—Did you see who the driver was? —No, so quickly ____ that I couldn’t get a good look at his face.
____ 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.
It is the test system, rather than the teachers, ____ is to blame for the students' heavy burden nowadays.
Many children are ____ in the countryside when their parents flood into the cities for jobs.
The UN officials say it could be many weeks and even months ____ a deal is reached.