Sharks are (0) of the most frightening creatures in our oceans. they are well prepared for feeding under water because they can (26) very well, and they can also ) movement through special lines on the sides of their bodies. these make sharks (28) for smaller sea creatures that become their food. although sharks are similar (29) other fish in a number of ways, their bodies are different. for example, unlike other fish, most sharks ) to swim all the time in order to breathe and stay alive, ) they hardly sleep at all. also, if sharks are turned over on their backs, they can stop (32) . this is a very useful technique for researchers ) are often required to (34) sharks. it allows them to ( out more about these fascinating creatures. 26 a watch b look c notice d see 27 a touch b feel c know d catch 28 a dangerous b difficult c serious d important 29 a with b from c to d of 30 a ought b need c must d should 31 a so b as c but d or 32 a perfectly b finally c fully d completely 33 a which b who c what d whose 34 a sort b care c deal d handle 35 a discover b search