They participate 26 life enthusiastically and spontaneously.
答案：(C) in
【句型】participate in 是固定片語搭配，表示「參與（某事）」。to／at／on 都不是 participate 正確的搭配介系詞。
本題大考中心未公布逐題答對率，以下不談數據，只談觀念。
participate 的中文「參與」後面不必接介系詞，中文完全幫不上忙；四個都是高頻介系詞，只能靠有沒有把整組記起來。
四個選項都是介系詞，可見這一格考的是 participate 跟哪一個搭配。participate 是不及物動詞，後面不能直接接受詞；表達「參與、參加」時，後面一定要接介系詞 in，這正是它非有介系詞不可的原因。所以填 in：They participate in life enthusiastically and spontaneously.（他們熱情而自發地參與生活。）這一型的題目文法上刷不掉任何一個選項，只能靠平常有沒有把動詞與介系詞當成一組記住。題庫裡同一型的還有好幾題，可以一起記：participate in（參與）、work on（著手做，89 年第 18 題）、contribute to（促成，88 年第 28 題）、a solution to（……的解決辦法，86 年第 32 題）。背動詞或名詞時要連介系詞一起背，這是唯一的辦法。
to、at、on：三個都是高頻介系詞，但都不與 participate 組成通行的說法。
participate in（參與）、take part in（參加）、be involved in（涉入、參與）、engage in（從事）、enthusiastically（熱情地）、spontaneously（自發地）。
A person's self-concept is reflected in the way he or she behaves, and the way a person behaves affects other people's reactions. 21 , the way people think about themselves 22 a profound effect on all areas of their lives.
For instance, people who have a 23 sense of self-esteem usually act with confidence. 24 they have self-assurance, they do not need constant praise and encouragement from others to feel 25 about themselves. Self-confident people are their own best friends. They participate 26 life enthusiastically and spontaneously. They are not affected by 27 others think they "should" do.
People 28 high self-esteem are not hurt by criticism; they do not 29 criticism as personal rejection. 30 , they tend to believe criticism to be suggestion for improvement.