【题目】Much time ________ sitting at a desk, office workers are generally troubled by health problems.
A.spentB.is spentC.has been spentD.having spent
在线课程【答案】A
【解析】
考查非谓语动词。句意：办公室职员长时间坐在办公桌前，通常都受到健康问题的困扰。本句已经存在谓语动词且句中没有连词，故spend在句中作非谓语动词，与逻辑主语time构成被动关系，故用过去分词spent。故选A。