英语.短文填空. a lift is very useful.It looks l（） a sam

英语.短文填空. a lift is very useful.It looks l（） a sam英语.短文填空.a lift is very useful.It looks l（） a samll room. It goes up and d（） all day.Sometimes a worker stands in the lift.He or she operates it up and down.In modern lifts there is no worker,people walk in.They know what f（） they want to go to.They push a button and the l（） goes to that floor.It is very fast and easy.Lifts are very important to us.Why?Think about a tall b（）.Maybe it has twenty floors.Maybe it has ifty or m（）.Who can walk up all the stairs?Maybe people can climb them once.Can someone （） thiety floors to an office every day?Can small children walk up to their rooms on the twenty fourth floor?Can their mothers or fathers c（） food up to all those stairs?Of course n（）.We can have very highbuildings b（） we have lifts. We could not have all the beautiful tall buildings without lifts.Because it is too tired for people to climb the stairs every day.