--What made her so upset?
--
A. Lost her bike.
B. Losing her bike,
C. She lost her bike .
D. Because of losing her bike.
网友回答
A. Lost her bike.
(答案→)B. Losing her bike,
C. She lost her bike .
D. Because of losing her bike.
解析：动名词用法。根据句意：丢了自行车让她如此难过。Losing her bike动名词短语在句中做主语。