【题目】Mary clapped her hand over her mouth _____ she realized her words hurt little Tom.
A. ever since B. as if
C. so that D. as soon as
在线课程【答案】D
【解析】
试题分析： 考查连词。A. ever since 曾经；B. as if好象；C. so that 因此；D. as soon as一。。就；句意：当玛丽意识到自己的话伤害到汤姆时，用手捂住嘴；根据句意选D项。