-What has made your brother so sad, Lily? - . [ ] A．Because he has lost his bike
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![-What has made your brother so sad, Lily? - . [ ] A．Because he has lost his bike](/pic/43_938346.jpg)
－What has made your brother so sad, Lily?
－________.
[]
A．Because he has lost his bike
B．Because of losing his bike
C．He lost his bike
D．Losing his bike, I think
试题答案
答案：D