蒸气来自哪里?它来自河里的水.填空— —the vapour — — It— — the — in the rive.
问题描述：
蒸气来自哪里?它来自河里的水.
填空
— —the vapour — —
It— — the — in the rive.
答
Where is the vapour come from
It comes from the water in the river.