1 . 当他看到从河里升起的薄雾和环绕山顶的轻云时，他不禁泪流满面。
When he saw the mists rising from the river and________________ , he was reduced to tears.
When he saw the mists rising from the river and
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2 . When Tom opened the front door of their flat to investigate, he saw a thick cloud of smoke . (同义句转换)
When Tom opened the front door of their flat to investigate,________________ .
When Tom opened the front door of their flat to investigate,
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