16．莫扎特到14歲的時候，就已經(jīng)譜寫了很多管弦樂曲．
By the time he was 14，Mozarthad composedmany pieces for the harpsichord．

分析 莫扎特到14歲的時候，就已經(jīng)譜寫了很多管弦樂曲．

解答 答案：had composed 考查漢譯英．by the time意為"到…時候為止"引導時間狀語從句，主句則表示在此時間之前某個事件已經(jīng)完成，需要注意的是，當從句用過去時時，主句通常用過去完成時．故正確答案是：had composed．

點評 考查漢譯英，注意英漢之間的差異，英語與漢語之間的一些特殊表達，準確地理解句子、翻譯句子，然后根據(jù)句意及提示完成句子，使句意更通順．

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