- 單選題A new technique( ), the yields as a whole increased by 20 percent.
- A 、working out
- B 、having worked out
- C 、having been worked out
- D 、to have been
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參考答案【正確答案：C】
【譯文】由于研發(fā)出了新的技術(shù)，總產(chǎn)量增長(zhǎng)了 20%。
【解析】鑒于“技術(shù)”與“研發(fā)”在語(yǔ)義上是“被動(dòng)”關(guān)系，故可排除A和B； C和D都可與前面的名詞短語(yǔ)A new technique構(gòu)成獨(dú)立主格結(jié)構(gòu)，但考慮到worked out和increased兩個(gè)動(dòng)作行為的發(fā)生時(shí)間，可知兩者存在明確的“先后”順序，且前者是后者發(fā)生的原因，由此可以排除D (不定式表示將來(lái)），C為正確項(xiàng)。C項(xiàng)在語(yǔ)義上相當(dāng)于一個(gè)原因狀語(yǔ)從句：As a new technique had been workedout...。
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