74. We need some ___________(志愿者) to help us.

73. If you want to sell your books, you can a__________ on the Internet.

72. For heavy smokers, __________(定期的、有规律的) medical checks are advisable.

　　　 根据题中所给的汉语或首字母写出符合句意的单词的正确形式。

71. I love working abroad and meeting people from different __________(文化)

35.Laws that punish parents for their little children’s actions against the laws get parents __________.

　 A. worried 　B. worrying 　　　　C. worry　 　　　　D. being worried