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初二完形填空bad weather can come up s_ at sea.Winds and waves can

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初二完形填空bad weather can come up s_ at sea.Winds and waves can smash
bad weather can come up s__ at sea.Winds and waves can smash boats.People may end up in the water.when that h__,thee is no time to waste.Pigeons may be sent to the rescue.
the pigeons are a special group of birds.The Navy is training their birds to look for the colour orange in the water.that is b__ life jackets are orange.
the pigeons ride in a helicopter with the Navy crew .The birds can see a very long distance- about 2,000 feet .They usually spot the orange life jackets b__ the crew does.That means the crew can act more quickly to s__people
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