【题目】I was ________ leave ________ I saw him ________ towards me with a bag in his hand.
A．about to；when；run B．about to；when；running
C．to about；when；run D．to about；while；run
在线课程【答案】B
【解析】
试题分析：句意：我正要离开，看见他朝我跑来，手里拎着包。be about to do…when…为固定搭配，正要做某事的时候…，see…doing看见…正在做某事。故选B。