Clinical evidence began to suggesting that the new drugs had a wider range of useful effect than had been predicted from experiments in animals.
A. operate.
B. strengthen
C. accumulate
D. approve
网友回答
A. operate.
B. strengthen
(答案→)C. accumulate
D. approve
解析：动词辨析。A操作；B加强；C积累，累积；D批准，赞成；结合句意可知C正确。句意：临床证据不断的说明这种新药比之前在动物身上的预测有更广范围的有用的影响。