阅读理解。 The earth moves round the sun, and the moon moves round the earth. When our part of the earth turns to the moon, it is night. The sun is much bigger than the moon. But sometimes the moon looks bigger than the sun, because it's much nearer to the earth. The sun is very bright. It gives a very strong light. The moon looks quite bright, too. But it doesn't give any light at all. The moon looks much bigger and brighter than the stars. But actually the stars are much bigger and brighter than the moon. They look smaller than the moon because they're much farther away from us. 1. _____ moves round _____. A. The earth; the moon B. The moon; the earth C. The moon; the stars D. The sun; the earth 2. Sometimes the moon looks bigger than the sun, because _____. A. it is much bigger than the sun B. it comes out only at night C. it is much nearer to the earth than the sun D. it doesn't give a strong light 3. The sun _____. A. is very bright, and it gives a very strong light B. isn't bright, but it gives a very strong light C. is very big, but it doesn't give any light at all D. is very round, but it can't move round 4. The stars _____. A. look much bigger than the moon B. look much bigger than the sun C. are a lot brighter than the moon, but they are not bigger than the moon D. are much farther away from us than the moon