29. 《题文》there are more than 740 million chinese _______ to second-hand smoking in public
places now.
a. are being exposed b. exposed c. to expose d. having been exposed
《答案》《知识点》a9 非谓语动词
《答案解析》b。解析：句意：在有7.4亿多中国人在公众场合暴露在二手烟的环境中。根据“there be + 名词 + 过去分词”“有……被……”句型，chinese是expose的动作承受者。故选b。
30. 《题文》with so many good friends together with you, you must have been happy during the past national golden week, _____?
