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

 

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】

考點：考查含蓄虛擬語氣

所謂含蓄條件句就是利用語境不直接說出條件的句子。這種句子可以分為兩類：一種是廣義的含蓄條件句，另一種是狹義的含蓄條件句。1. 廣義含蓄指的是不用連詞 if 或 unless 介紹條件，而是改用其他方式。事實上這些表達方式也是同樣是條件狀語。（1）用介詞引入條件： * but for（如不是, 如沒有）：注意，凡是出現(xiàn)這個復(fù)合介詞的句子，必須要用虛擬語氣， * without/with (在不具備/具備…的條件下), * under （在…條件下）（2）分詞短語充當(dāng)條件（分詞短語本身就具有充當(dāng)條件狀語的功能），（3）表示不具備條件的連詞連詞：but,but that,or或otherwise，2. 狹義含蓄指的是不用任何語言方式顯示條件，而是把條件隱藏在具體的原環(huán)境中，（1）用上下文暗示條件，（2）用委婉語氣暗示條件，（3）用表示愿望的語氣暗示條件。

 

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