【題目】Much time ________ sitting at a desk, office workers are generally troubled by health problems.

A.spentB.is spentC.has been spentD.having spent

【答案】A

【解析】

考查非謂語動詞。句意：辦公室職員長時間坐在辦公桌前，通常都受到健康問題的困擾。本句已經(jīng)存在謂語動詞且句中沒有連詞，故spend在句中作非謂語動詞，與邏輯主語time構成被動關系，故用過去分詞spent。故選A。

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