her son outside the school gate, she drove straight to her work place.
A. To drop
B. Dropped
C. Having dropped
D. Having been dropped
网友回答
A. To drop
B. Dropped
(答案→)C. Having dropped
D. Having been dropped
解析：句意：将儿子在校门外放下后，她径直开车上班。因为她先将儿子在校门外放下，然后径直开车上班。所以是有动作的先后关系，用现在分词的完成式做状语，所以选C。