5．The bridge is 200 metres in length或The bridge is 200 metres long.

4．I was able to pick you up on the shortwave radio.

3．I was ruined by that law case.

2．In my experience，very few people really understand the problem.

5．这桥长200米。

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答案：1.It occurred to me that I would travel to Europe.

4．我能用短波收音机收听到你的信号。(pick up)

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3．我被那场官司搞得倾家荡产。(ruin)

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2．据我的经验看，真正理解这个问题的人很少。(in one’s experience)

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1．我突然想到要去欧洲旅游。(occur to)

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8．When you get the paper back，pay special attention to what ________.

A．have marked　 B．have been marked　 C．had marked　 D．had been marked

解析：句意：当你拿回试卷时须特别注意已经标注过的部分。本题考查动词的时态，该句强调过去已经修改过的东西并强调对现在的影响，用现在完成时，又因其主语为what，所以用被动语态。故用现在完成时的被动语态，选B。

答案：B