【題目】________its tests successfully, the driverless car will appear on the market soon.

A.UndergoingB.UndergoneC.To undergoD.Having undergone

【答案】D

【解析】

考查非謂語動(dòng)詞。句意：已經(jīng)成功經(jīng)歷了測試，無人駕駛車輛很快就會(huì)出現(xiàn)在市場上。分析句子可知，此處應(yīng)用非謂語動(dòng)詞作狀語，the driverless car和undergo之間是邏輯上的主動(dòng)關(guān)系，故應(yīng)用現(xiàn)在分詞，又“經(jīng)歷測試”的動(dòng)作發(fā)生在“出現(xiàn)”之前，故用現(xiàn)在分詞的完成式having done，故選D項(xiàng)。

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