A lift is wonderful. It’s also (11) for us. Think about a tall building. Maybe it has twenty floors, maybe it has (12) or

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问题 A lift is wonderful. It’s also  (11)   for us. Think about a tall building. Maybe it has twenty floors, maybe it has  (12)   or more. Who can walk all these stairs every day? So if we use a lift to go up and down, it will be easier for us to live in a tall building. We can have tall buildings because we have lifts. Sometimes a worker  (13)   in the lift. He or she runs it up and down. In  (14)   lifts there is no worker. The people walk in. They know what floor they want to go. They push a  (15)   and the lift goes to that floor. It’s very fast and easy.
  
A lift is wonderful. It’s also 11 important for us. Think about a tall building. Maybe it has twenty floors, maybe it has 12 fifty or more. Who can walk all these stairs every day? So ff we use a lift to go up and down, it will be easier for us to live in a tall building. We can have tall buildings because we have lifts. Sometimes a worker 13 stands in the lift. He or she runs it up and down. In 14 modern lifts there is no worker. The people walk in. They know what floor they want to go. They push a 15 button and the lift goes to that floor. It’s very fast and easy.

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答案fifty

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