You can never imagine what great trouble I had __________ the poor boy who was hurt seriously.
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.
30. It is the test system, rather than the teachers,______is to blame for the students’ heavy burden nowadays.
29. The moment we heard of the accident, we____the work to rescue those trapped in the mine.
28. You can’t complain of being lonely____you don’t make any effort to communicate with others.
27. The boy was busy doing his homework, only_____once in a while to look out of the window.