【正确答案】 D

【答案解析】on account of是“介词短语”，指“因为，由于”。句意为“因为得了流感，女孩今天没来上课”，如：Yesterday she couldn’t come to my birthday party on accountof heavy rain．由于下大雨，她昨天没来我的生日聚会。请考生注意，表示“因为”的介词短语如下：on account of,because of,due to，owing to，as a result of,as aconsequence of,thanks to，by reason of,by／in virtue of,on grounds of,in view of等。