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 _______________(27) movement through special lines on the sides of their bodies. These make sharks very_________________ (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 _____________________(30) to swim all the time in order to breathe and stay alive, ____________________(31) they hardly sleep at all. Also, if sharks are turned over on their backs, they can stop moving_________________ (32) . This is a very useful technique for researchers ____________________(33) are often required to (34) sharks. It allows them to (35)__________________________. 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