There are two kinds of heroes: heroes who shine in the face of great danger, who perform an 21 act in a difficult situation, and heroes who live an ordinary life like us, who do their work 22 by many of us, but who 23 a difference in the lives of others.
答案：(C) amazing
語意「在困難情境中做出驚人之舉的英雄」，amazing（驚人的）符合英雄事蹟的語境；annoying（惱人的）、interfering（干涉的）、inviting（誘人的）都不合。
看到 -ing 與 -ed 你大概會先想主動被動，但這四個選項並不是同一個字的變化，是四個不同的字：annoying（惱人的）、interfering（愛干涉的）、amazing（令人驚嘆的）、inviting（誘人的）。這題考的是字義，不是形態。倒是 inviting 值得特別注意：它不是「邀請的」，而是「誘人的、吸引人的」（an inviting smell 誘人的香味）。
空格在 perform an ___ act in a difficult situation 裡，前面那個關係子句是 who shine in the face of great danger，shine 是「發光、表現出色」，講的是在極大危險面前依然亮眼。再往後看，第二段有一句 Heroes are selfless people who perform extraordinary acts，extraordinary（非凡的）與空格是同一個位置、同一組搭配 perform an ... act，等於文章自己把答案的方向寫出來了。amazing 與 extraordinary 同一個方向。
annoying 是惱人的，方向與英雄相反。interfering 是「愛干涉別人的」，帶貶義。inviting 是誘人的，用來形容食物、氣味、景色，不形容英勇的舉動。順便把國中那組主被動掛鉤複習一次：interesting 是「令人感興趣的」（東西發出來的），interested 是「感到有興趣的」（人接收到的）。同一篇的第 22 題就要用到這組概念，兩題可以對照著看：本題四個選項是四個不同的字，第 22 題才是同一個字 notice 的四種形態。
perform an act（做出某種舉動）、in the face of（面對、當著……的面）、an amazing performance（令人驚嘆的表演）、be amazed at（對……感到驚訝）、interfere with（干擾、妨礙）、an inviting smell（誘人的香味）。
There are two kinds of heroes: heroes who shine in the face of great danger, who perform an 21 act in a difficult situation, and heroes who live an ordinary life like us, who do their work 22 by many of us, but who 23 a difference in the lives of others.
Heroes are selfless people who perform extraordinary acts. The mark of heroes is not necessarily the result of their action, but 24 they are willing to do for others and for their chosen cause. 25 they fail, their determination lives on for others to follow. The glory lies not in the achievement but in the sacrifice.