改错 At a time,some of our classmates were lost in playing computer games.
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![改错 At a time,some of our classmates were lost in playing computer games.](/uploads/image/z/5781584-56-4.jpg?t=%E6%94%B9%E9%94%99+At+a+time%2Csome+of+our+classmates+were+lost+in+playing+computer+games.)
改错 At a time,some of our classmates were lost in playing computer games.
改错 At a time,some of our classmates were lost in playing computer games.
改错 At a time,some of our classmates were lost in playing computer games.
At one time 曾一度
这样就和后面的 were lost in.时间一致了
请及时采纳,不懂继续问( 天天在线 )
a --> one