59.The professor watched the mondey by ____.

A.watching it through the keyhole

B.waiting outside the room

C.kneeling down at the door

D.digging a hole in the door

60.The expriments were probably（可能） made ____.

A.in the forest

B.outside a zoo with many people around

C.in a lab

D.in the professor‘s home

C

London’s River Thames（泰晤士河） has twenty-seven bridges. But Tower Bridge, the first bridge over the Thames as you travel to London from thesea, is the most famous of them all. What makes Tower Bridge so exciting（令人激动）? Why do visitors come from all over the world to see it?

The thing that is surprising about Tower Bridge is that it is open in the middle. It does this to let the big ships through to the pool（水域） of London. If you are lucky enough to see the bridge with its two opening arms high in the air, you will never forget it.

On its north side stands the Tower of London itself. Although they look the same age, the Tower is almost a thousand years old, and Tower Bridge is only about one hundred. It was built in 1890s. By 1850, eveyone agreed that a hridge adoross the Thames near the Tower was most necessary（必要）. But the designers（设计师） agrued（争论） about the nes bridge for another thirty years. The took so long because they had two big problems.

61.Tower Bridge is ____.

A.about one thousand years old

B.the oldest and the most famous bridge in London

C.the forst one you can see when you go from the sea to London

D.the one that took workers about 30 years to build

62.People in London agreed that ____.

A.twenty seven bridges should be built over Thames River

B.designers should atgue about the bridge for about thirty years

C.a bridge should be built by people from all over the world

D.a new bridge should be built near the Tower of London

63.The Tower of London is ____.

A.across the Thames B.on the north of Tower Bridge

B.in the middle of Tower Bridge D.much younger than Tower Bridge

64.From the reading we can learn that ____.

A.you have to go from the sea Tower Bridge

B.the Tower of London doesn‘t look so old

C.Tower Bridge had two big problems

D.you can see Tower Bridge open its arms at any time