The scientists have made an______study of the viruses that cause the disease.

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问题 The scientists have made an______study of the viruses that cause the disease.

选项 A、exhausted
B、exhausting
C、exhaustive
D、exhaustion

答案C

解析 句意:科学家们对导致该项疾病的病毒做了非常详尽的研究。exhausting使耗尽。exhausted精疲力竭的,耗尽的。exhaustion筋疲力尽。exhaustive详尽的,具体的。
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