Stephen ____(lies或is lying) on the bed while Nick ____(plays或is playing或playing) computer games.

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Stephen ____(lies或is lying) on the bed while Nick ____(plays或is playing或playing) computer games.

Stephen ____(lies或is lying) on the bed while Nick ____(plays或is playing或playing) computer games.
Stephen ____(lies或is lying) on the bed while Nick ____(plays或is playing或playing) computer games.

Stephen ____(lies或is lying) on the bed while Nick ____(plays或is playing或playing) computer games.
is lying is playing

两个都是选择进行时的,我在线给你解释