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.
答案：(B) Because
前後句是因果關係「因為他們有自信，所以不需要持續的讚美」，Because（因為）符合。Until（直到）、Unless（除非）、However（然而）都不符合因果邏輯。
本題大考中心未公布逐題答對率，以下不談數據，只談觀念。
四個選項裡有三個是從屬連接詞、一個是轉承副詞，如果沒看出前後是因果，很容易被 However 帶走——畢竟「不需要別人的讚美」聽起來有點反差。
先用形態刷一個：However 是轉承副詞，它不能像連接詞那樣帶出一個子句再接主要子句（要用它得寫成 However, they do not need ...，後面不能再掛一個 they have self-assurance）。剩下 Until、Because、Unless，用語意分：前半是 they have self-assurance（他們有自信），後半是 they do not need constant praise and encouragement from others to feel good about themselves（他們不需要別人不斷的讚美與鼓勵才能肯定自己）。有自信是原因、不需要外界肯定是結果，順向因果，填 Because。這個判準在題庫裡已經是第三次出現：85 年第 24 題與 86 年第 21 題都是同一組（因果與讓步二選一）。口訣一句話：只要前後兩件事同向，就不可能是讓步。
However（然而）：形態不合，而且前後同向。Until（直到）：講時間的終點，這裡沒有時間關係。Unless（除非）：帶出排除性的條件，語意也不通。
because ＋ 子句（因為）、constant praise（不斷的讚美）、encouragement（鼓勵）、depend on others（依賴別人）、need sth from sb（需要來自某人的……）、be one’s own best friend（做自己最好的朋友）。
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.