问题:
[单选题]The scientists have made an ________ study of the viruses that cause the disease.()Rcv答案窝(daanwo.com)-大学作业答案分享平台
AexhaustedRcv答案窝(daanwo.com)-大学作业答案分享平台
BexhaustingRcv答案窝(daanwo.com)-大学作业答案分享平台
CexhaustiveRcv答案窝(daanwo.com)-大学作业答案分享平台
Dexhaustion