专升本考试

试题来源：专升本英语-1
【单选题】 One reason it is difficult to know why the whales are dying is that ______.
A．the whales travel such a long distance
B．there are more whales than there used to be
C．the whale bodies are too old to study by the time they are found
D．the whales are endangered

参考答案：C
网考网解析：
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