用方框中所给单词的适当形式填空，使短文正确、通顺。每词限用一次。
| clean take catch care many green back heavy part under |
Skin-diving is a new sport today. This sport 1________ you into a wonderful world. It is like a visit
to the moon. When you 2________ water, it is easy for you to climb big rocks, because you are no
longer 3________.
Here, under water, everything is blue and 4________. During the day, there is much light. When fish
swim nearby, you can 5________ them with your hands.
When you have tanks (罐) of air on your 6________ you can stay in deep water for a long time. But
you must be 7________ when you dive in deep water.
To catch fish is one of the most interesting 8________ of this sport. Besides, there are more uses
for skin-diving. You can 9________ ships without taking them out of water. You can get 10________
things from the deep water.
Now you see skin-diving is both useful and interesting.