Wstaw odpowiednie słowa. 

The photo shows a group of people doing white water rafting. They're moving very fast on a mountain river. (1) .......... exciting! It looks quite bad, but it's probably safer (2) .......... many other extreme activities. The people are wearing life jackets, so it isn't (3) .......... dangerous as it seems. Actually, it's something I'd like to try one day. It must be (4) .......... good fun!