题目

Far from the land of Antarctica(南极洲), a huge shelf of ice meets the ocean. At the underside of the shelf there lives a small fish, the Antarctic cod.       For forty years scientists have been curious about that fish. How does it live where most fish would freeze to death? It must have some secret. The Antarctic is not a comfortable place to work and research has been slow. Now it seems we have an answer.       Research was begun by cutting holes in the ice and catching the fish. Scientists studied the fish’s blood and measured its freezing point.       The fish were —Do you like seeing a movie on your mobile phone?— No. I ______do that because it makes me uncomfortable.A. seldom B. oftenC. usually D. sometimes