問題詳情：
It’s said that a giant rock was located in the North Sea but once many boats and ships 16 (strike) it and sank．
About a century years ago，a kind and imaginative minister came up with an idea to have a buoy (浮標) 17 (fasten) to the rock．On the top of the buoy 18 (place) a bell， 19 would ring whenever any ships got closer．When hearing the bell ringing，sailors knew where the rock was and stayed safe．One day, a sea robber Rover happened to sail not far away from the rock．
Seeing 20 buoy floating in the water，he decided to play a trick．Soon his crew broke the chain that held the buoy, let the bell go into the water and then sailed away．In the following weeks，they robbed many 21 ships around the seas and filled the ship with a great 22 （vary) of treasures．Unfortunately, when returning，they themselves had no idea how to get away from the terrible rock 23 the ring．The ship was moving swiftly in the dark 24 there was a great crash． 25 was the very rock and the ship began to sink．
【回答】
16． struck 17. fastened 18. was placed 19. which 20. the 21. other 22 variety 23. without 24. when
知識點：語法填空
題型：閲讀填空
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