例1、the discovery of new evidence led to _________. a. the thief having caught b. catch the thief c. the thief being caught d. the thief to be caught 答案为c。《解析》 lead to这个词组中to是介词，后面跟名词，于是b被排除，the thief是动名词逻辑上的主语，构成动名词的复合结构，与catch之间应是被动关系，故排除a。常见的带介词to的短语有：(get) be used to, look forward to，look up to, stick to, object to, be devoted to, pay attention to等。例2、though _______money, his parents managed to send him to university. a. lacked b. lacking of c. lacking d. lacked in 答案为c。《解析》 lack是及物动词，后接宾语money。his parents与lack是逻辑上的主谓关系，要用现在分词作状语。译文：虽然缺钱，他的父母亲还是设法让他上了大学。 例4、 _____ to sunlight for too much time will do harm to one's skin. a. exposed b. having exposed c. being exposed d. after being exposed 答案为c。《解析》 在非谓语动词中，用动名词或不定式来作主语，而分词和介词短语不能作主语，因此a、d被排除。在这个句子中，will do是谓语，缺少主语，要用动名词作主语。expose与one's skin是动宾关系，所以要用动名词的被动式being
