【題目】他們正在討論把墻涂成什么顏色。

【答案】They are discussing what colour to paint the wall.
【解析】表示“正在討論”用現(xiàn)在進(jìn)行時be doing,主語“他們”用代詞they表示，是復(fù)數(shù)形式，故謂語用are discussing。what color什么顏色，paint the wall涂墻；作為動詞discuss的賓語，可以是“疑問詞+動詞不定式”的短語。故此處為They are discussing what colour to paint the wall.

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