根据短文内容判断正（T）误（F）。 Ski-diving 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 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 (充足的) 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 partsof this sport. Besides, there are more uses for ski-diving. You can clean ships without taking them out of water. You can get things from the deep water. Now you see that ski-diving is both Useful and inleresting. (     )1. Ski-diving is an old sport. (     )2. Everything is red under the water. (     )3. You can stay in deep water for a long time with tanks of air on your back. (     )4. When you are under the water,it is hard for you to climb the rocks. (     )5. Ski-diving is both useful and interesting.