Part Ⅳ Cloze (10 points)

　　Most people think of sharks (鯊魚) as huge, powerful, frightening predators (掠奪性的食肉動物), ready at any moment to use their sharp teeth to attack swimmers. There are a lot of ___61___ about sharks.

　　First, there are about 350 species of shark, and ____62____ of them are large, They range in __63__ from the dwarf shark, which can be only six inches long and can be held in the hand, __64__ the whale shark, which can be more than 5 feet long.

　　The second misunderstanding of shark concerns its terrible teeth whose ___65___ and type can vary greatly among the ___66___ species of shark. A shark can have from one to seven sets of teeth at the same time, and some types of shark can have several hundred teeth in each jaw. It is true that the cruel and predatory species do have extremely ___67 ___ teeth used to tear and cut their victim apart, many other types of shark, however, have teeth more suitable to holding than to cutting.

　　___68___, not all sharks are predatory animals ready to strike out at humans. In fact, only 12 of the 350 species of shark have been know to attack humans, and a shark ___69___ attacks humans unless is made angry. The types of shark that have the worst ___70___ with humans are the tiger shark, the bull shark, and the great white shark. However, for most species of shark, even some of the largest types, there are no known instances of attacks on humans.

　　61. A. wrong ideas B. interesting information C. stories D. description

　　62. A. none B. all C. not all D. few

　　63. A. size B. weight C. danger D. difference

　　64. A. and B. but C. to D. while

　　65. A. shape B. color C. form D. number

　　66. A. same B. other C. huge D. different

　　67. A. hard B. strong C. sharp D. marvelous

　　68. A. Thirdly B. Finally C. Unfortunately D. Usually

　　69. A. needs to B. may C. can D. seldom

　　70. A. accident B. record C. action D. damage