问题补充:
Hearing a scream, I rushed downstairs, onlythe hostess lying unconscious on the floor.
A. seeing
B. having seen
C. seen
D. to see
答案:
A. seeing
B. having seen
C. seen
(答案→)D. to see
解析:考查不定式做状语。不定式与only连用做状语,表示意料之外的结果;现在分词表示意料之中的结果。句意:听到尖叫声,我冲下楼,发现女主人躺地上,人事不省。这是一个意料之外的结果。故D正确。