I'm Amy Black．I have never seen sharks in the____．But as a(n)____，I have seen sharks in an aquarium(水族馆)．

    ____，there are between 200and 250 kinds of sharks of different sizes．Sharks are much____than other fishes．The largest carl be as long as 15____ largest shark____about 3，200 kilos．Usually sharks don't attack(攻击)people．Sometimes they attack people____themselves．One of____sharks is the Great White Shark．They attacked a lot of people on the beaches of America．

一锤定音（选择正确的读音）

冒昧____（mèi  wèi）       嫉妒____（dù  hù）        寂寞____（mù  mò）

受益匪浅____（fēi  fěi）　   告诫____（jì  jiè）         患者____（huàn  chuàn）

和睦____（huó  hé）        年逾古稀____（yú  yū）

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