单选题 ______ by millions every night, television advertisements are a powerful means of communication.
A. Being seen B. Seeing C. To see D. Seen

【正确答案】 D
【答案解析】[解析] 电视和观看的关系应该是被动的，过去分词表示被动，因此可排除B、C两选项。A选项being seen有强调正在进行的意味，在此并无必要。