The lively boy suddenly appeared to be ________ quiet, so his mother knew something unusual must have happened.
A.casually
B.consequently
C.curiously
D.constantly
网友回答
C解析考查副词辨析。Casually 随便的，偶然的consequently 因此，结果 curiously好奇地 constantly持续地句意为那个活泼的男孩突然看起来出奇地安静，因此他的妈妈知道不寻常的事情发生了。