【题目】Seeing the big crowd coming towards him, he started to run down the hill, but ______ and went down on his hands and knees in the melting snow.
A. slipped B. skied C. signalled D. sank
在线课程【答案】A
【解析】
试题分析：考查动词辨析。slip 滑倒；ski 滑雪；signal 向……发信号；sink下沉。句意：看到一大群人向他冲过来，他开始向山下跑，但他滑倒了，手和膝盖都趴在融雪里面 。根据句意可知选A项。
考点 : 考查动词辨析