摘要： Six books have been written by her, the story book.
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用所给词的适当形式填空。
1. Edison is one of the greatest ________ (invent) in the world.
2. The gravity on the surface of Mars is about one ________ (three) as strong as it is on the earth.
3. Six books have been written by her, ________ (include) the story book.
4. This railway line _________ (connect) London to Edinburgh.
5. Scientists think that there _________ (be) life on the earth for millions of years.
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2. The gravity on the surface of Mars is about one ________ (three) as strong as it is on the earth.
3. Six books have been written by her, ________ (include) the story book.
4. This railway line _________ (connect) London to Edinburgh.
5. Scientists think that there _________ (be) life on the earth for millions of years.