根据句意及汉语提示，写出各单词的正确形式，每空一词。
小题1:I really don’t know what     (发生) here last night. 
小题2:Thanksgiving Day is one of the most important     (西方的) festivals.
小题3:Sorry, I didn’t follow you. Would you Please speak more     (清楚地) ?
小题4:Whatever your     (选择) is, I will just follow you.
小题5:In the morning, taking a walk and     (呼吸) some fresh air are good for your health.