根据短文内容及首字母提示，填写所缺单词，使短文意思完整。每空限一词

The worst traveler in the world was Paul of San Francisco. Once he f小题1:   from the U.S. to his hometown in Italy to see someone at home. The plane made a one-hour stop to get oil at an airport in New York. Paul thought he was in Rome, s小题2:    he got off the plane.

When nobody was there to meet him, Paul thought maybe the heavy t 小题3:   made his friends late. While looking for their address, Paul found that the old “Rome” had changed a lot. He found many high m   小题4: buildings instead of old ones. He also found that many people spoke English but not Italian and that main street signs were

w  小题5:  in  English.

Paul knew very l   小题6:   English. So he asked a policeman in Italian the way to the bus station. He happened to meet a policeman who was also born in Italy and answered in the same l   小题7:      .

After twelve hours’ traveling round on a bus, the driver handed him over to a 小题8: policeman But this time, this policeman could only speak English. So Paul asked the policeman why the Rome police employed(雇佣)so many people who spoke English as policemen.

Paul didn’t b   小题9:   he was in New York when he was told so. To get him on a plane to Italy, he was s 小题10:     to the airport in a police car.

在位移法中，将铰接端的角位移、滑动支承端的线位移作为基本未知量( )。

(A) 绝对不可以
(B) 一定条件下可以
(C) 可以，但不必要
(D) 必须