Everybody thought they could win the game, but it turned out tha

Everybody thought they could win the game, but it turned out that they （ ） it.

lose

had lost

has lost 

lost

本题考查时态。but连接的两个并列句均为一般过去时，后半句中谓语动词是turned，所以从句中也是一般过去时。lose的过去式是lost。

句意：每个人都以为他们能赢这场比赛，结果却输了。