【推荐1】Mum says we’d better not eat too much roast food as it may make us suffer ________ heat inside our bodies, according to traditional Chinese medicine. (用适当的词填空)

【推荐2】The strikers were threatened ________ dismissal (解雇) if they did not return to work. （用适当的词填空）

【推荐3】We don't need to be ashamed ___________her appearance. （用适当的词填空）

【推荐1】They invited the world to participate_________an international exposition. （用适当的词填空)

【推荐2】In the ancient Greek Olympics,only men were allowed to participate _____it. (用适当的词填空)

【推荐3】The activity is so interesting that we all want to participate________ it. (用适当的词填空)