—What’s made Mr. Grey so sad?— three tickets to the pop art exhibition.A. LosingB. LostC.

问题补充：

—What’s made Mr. Grey so sad?

— three tickets to the pop art exhibition.

A. Losing

B. Lost

C. Because of losing

D. As he lost

答案：

A. Losing

B. Lost

C. Because of losing

D. As he lost

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