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：(A) make
【句型】make a difference 固定片語「造成影響/帶來改變」；do／tell／count 都不搭配 difference 這個受詞。
這題你多半直接就選對了，因為 make a difference 太常見。但值得停一下看清楚它到底在說什麼：difference 是「差別」，make a difference 字面上是「造出一個差別」——本來會是這樣，因為你做了某件事而變成那樣，中間那段落差就是你造成的。所以中文譯成「帶來改變、產生影響」。
直接看受詞 a difference 要配哪一個動詞。這是搭配關係，不是文法關係，四個動詞裡只有 make 配得上。後面的 in the lives of others 指出改變發生在誰身上，也就是 make a difference in 或 make a difference to sth（對……造成改變）。
do a difference 這個說法不存在。tell 要配 difference 時是另一組搭配 tell the difference between A and B（分辨 A 與 B 的差別），受詞前面必須有 the，而且句意是「看出差別」不是「造成差別」。count 配的是 count on（依靠）或 count as（算作），不接 difference 當受詞。再補一個常一起考的：make a difference 是造成改變，make no difference 則是「沒差、無所謂」（It makes no difference to me.），兩者不要混。
make a difference to sth（對……帶來改變）、make no difference（沒有差別、無所謂）、tell the difference between A and B（分辨兩者的差別）、count on sb（依靠某人）、do good（有好處）、a selfless act（無私的舉動）。
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.