The opening between the rocks was very narrow, but the boys managed to _______ through.
33. Our English teacher devoted herself_____to her teaching, which earned her a good reputation in our school.
32. — Did you see who the driver was? — No, so quickly_____that I couldn’t get a good look at his face.
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.