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______the bones under the sand，the scientists concluded that they came from the dinosaurs about 65 million years ago．
A．Being inspectedB．Inspected
C．Having inspectedD．To inspect
C

試題分析：考查非謂語動(dòng)詞。本題的邏輯主語為the scientists，與inspect之間為主動(dòng)關(guān)系，再根據(jù)其動(dòng)作有先后性，故用having done結(jié)構(gòu)。句意：檢查過沙下面的骨頭之后，科學(xué)家斷定它們是來自大約6千5百萬年前的恐龍。故C正確。
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