1. 根据短文理解，选择正确答案。

      Skin-diving(轻装潜水)is a new sport today. This sport takes you into a wonderful new world. It is like a visit to the moon. When you are under the water, it is easy for you to climb big rocks, because you are no longer heavy.

      Here, under water, everything is blue and green. During the day, there is plenty of light. When fish swim nearby, you can catch them with your hands.

      When you have tanks of air on your back, you can stay in deep water for a long time. But you must be careful when you dive in deep water.

      To catch fish is one of the most interesting parts of this sport. Besides, there are more uses for skin-diving. You can clean ships without taking them out of water. You can get many things from the deep sea.

      Now you see that skin-diving is both useful and interesting.

1. （1） Skin-diving is a popular sport. It can take you to         .

   A . deep water B . the mountains C . a new world of land D . the moon
3. （2） In deep water         .

   A . there is no light at all B . there is plenty of light C . there is a new world of land D . it is like a visit to the moon
5. （3） You can climb big rocks under water easily because         .

   A . you are very heavy B . you are as heavy as on the land C . you are very thin D . you are not so heavy as on the land
7. （4） With tanks of air on your back, you can          .

   A . catch fish very easily B . stay under water for a long time C . climb big rocks D . have more fun
9. （5） Which of the following is NOT true?

   A . Skin-diving is a new sport. B . The only use of skin-diving is to have more fun. C . Skin-diving is like visiting the moon. D . Skin-diving is not only interesting but useful.