【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“我”已經(jīng)研究多年,而非表達想要進行研究的目的狀語,排除A;動詞study與主句主語I構成主動關系,應使用現(xiàn)在分詞而非過去分詞,排除D;結合for many years,該句強調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,故應選B。

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