【題目】People are recycling many things which they away in the past.

A. had thrown B. will be throwing

C. were throwing D. would have thrown

【答案】D

【解析】

試題分析：句意：人們現(xiàn)在正在回收過去會扔掉的東西。這句話的which引導(dǎo)的是定語從句，是一個隱含的虛擬語氣，因為in the past相當(dāng)于If they had been in the past，所以句子用虛擬語氣，和過去相反用would have done。所以選D。

【知識拓展】

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