Seeing the chemical ________ to the sunlight, Mr. Lee warned the workers to be careful when dealing with it.

A．to exposeB．exposingC．exposedD．being exposed

C

解析試題分析：考查過去分詞做賓語補足語，see+賓語+賓語補足語，the chemical和expose是被動關(guān)系，用過去分詞做賓語補足語，句意：看見化學(xué)物質(zhì)暴露于陽光下，專家警告工人處理的時候要當(dāng)心。選C。
考點：考查賓語補足語
點評：賓語補足語如果是動詞的話，要考慮動詞和它修飾的賓語的關(guān)系，是主動關(guān)系用現(xiàn)在分詞，是被動關(guān)系用過去分詞。

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