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    【題目】________ deserts for many years, I am still amazed at their beauty.

    A.To studyB.Having studiedC.StudyingD.Studied

    【答案】B

    【解析】

    考查非謂語動(dòng)詞。句意:(盡管)已經(jīng)研究了這么多年沙漠,我仍然驚詫于它們的美麗。此處是位于句首的讓步狀語,表達(dá)“我”已經(jīng)研究多年,而非表達(dá)想要進(jìn)行研究的目的狀語,排除A;動(dòng)詞study與主句主語I構(gòu)成主動(dòng)關(guān)系,應(yīng)使用現(xiàn)在分詞而非過去分詞,排除D;結(jié)合for many years,該句強(qiáng)調(diào)的是從很多年前開始到現(xiàn)在,已經(jīng)研究多年,使用現(xiàn)在完成時(shí),故應(yīng)選B。

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