无
*注意事项:
know(过去式)
am(过去式)
get(过去式)
learn(过去式)
take(过去式)
Australia is the world's sixth biggest country.( )
The koala looks like a grey bear.( )
Koalas sleep for 20 hours a day.( )
The koala has got long tail.( )
Sydney is the smallest city in Australia.( )
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