14．The agent was about to sign his name to the document ________，to our surprise，a stranger broke in to prevent him.

　　A．while

　　B．when

　　C．as

　　D．until

　　答案　B

　　解析　when此处为并列连词，相当于at that time，可译为“这时(突然)……”。

　　15．He found it increasingly difficult to read，________ his eyesight was beginning to fail.

　　A．though

　　B．for

　　C．but

　　D．so

　　答案　B

　　解析　句意为：他发现读书越来越困难，因为他的视力开始下降。for表示原因，符合句意。

　　Ⅱ.阅读理解

　　A

　　Tail Spin

　　Two dolphins race around in a big pool in the Ocean Park.The smaller dolphin，Grace，shows off a few of her tricks，turning around and waving hello to the crowd.The most amazing thing about her，however，is that she’s even swimming at all.She doesn’t have a tail.

　　Grace lost her tail as a baby when she got caught up in a fish trap.When the dolphin arrived at the Ocean Park in December 2005，she was fighting for her life.“Is she going to make it？” Her trainer，Abbey Stone，feared the worst.Grace did make it—but her tail didn’t.She ended up losing her flukes and the lower part of her peduncle.

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