A lift is wonderful. It is really only a small room. Rooms usually stay in one place. Lifts travel up and down all day long.
Sometimes a worker stands in the lift. He or she operates(操作)it up and down. In modern lifts there is no worker. The people walk in. They know which floor they want. They push a button(按纽)and the lift goes to the floor. It is very fast and easy.
Lifts are very important for us. Why? Think about a tall building. Maybe it has twenty floors. Maybe it has fifty or more. Who can walk up all the stairs?   Perhaps people can climb them one time. Can someone climb thirty floors to an office everyday? Can small children walk up to their rooms on the twenty–forth floor？Can their mother and their father carry food up all those stairs? Of course not.
We can have high buildings because we have lifts. We could not have all the beautiful tall buildings in the world without lifts. They are really wonderful.
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The lift is a room’s name.
In modern lift there must be a worker operating it.
If you go into a modern lift, you can’t put any buttons.
A small children can go to the thirty floor of a building easily.
It is convenient(方便)to live in a tall building without a lift.