How did the English Channel come into being? [br] [originaltext]W: Tom, do you

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问题 How did the English Channel come into being? [br]  
W: Tom, do you know why Britain is separated from the continent?
M: No. But I guess millions of years ago Britain was also a part of the Continent.
W: You are right. Nearly 10,000 years ago, at the end of the Ice Age, a great flood washed over a wide, low plain, and created the English Channel. From then on, the island of Britain was isolated from the rest of Europe.
M: I know there have been many people who have wanted to swim across the Channel, and some of them have succeeded.
W: What’s more, quite a lot of people have thought of building a channel tunnel since the 18th century, but no one thought this dream would come true. Now, however, the channel tunnel, the longest underwater passage on the earth, has been built.
M: When was it built?
W: A British team started to drill southeast from Dover and a French team started to drill northwest from Sangatte in 1987. The two teams met under the channel in December 1990, and they celebrated the completion of the 23-mile shaft.
M: Was it opened to the public immediately?
W: No. The tunnel was opened to the public in 1993 and now it is able to carry up to 30 million passengers a year.

选项 A、A British team started to drill southeast from Dover.
B、A French team started to drill northwest from Sangette.
C、The two teams started drilling in 1988.
D、The two teams met under the channel in December 1990.

答案 C

解析
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