Furthermore, the demand for a particular coin will also 24 influence coin values.
答案：(C) greatly
語意「特定硬幣的需求也會『大大地』影響硬幣的價值」，greatly（大大地）符合強調語氣；merely（僅僅，這裡是強調「很大」影響不是「僅僅」影響）、hardly（幾乎不，語意相反）、roughly（大略地）都不合。
四個選項都是副詞、都能修飾 influence，文法上刷不掉任何一個。這時容易被 merely 吸引，因為句首的 Furthermore 給人「再補充一點」的感覺，讓人以為這一項只是次要因素。
先看 Furthermore 的功能。它是用來追加一個與前面同等分量的論點，而前面講的是 scarcity is a major determinant（稀少是主要決定因素），追加的這一項自然也該是有分量的因素，不會是「僅僅稍微影響」。greatly（大大地）才接得上。再看後兩句怎麼展開：Some coins may command higher prices because they are more popular with collectors（有些硬幣賣得比較貴，是因為比較受收藏者歡迎），接著舉的例子是 1798 年的一角硬幣比 1916 年的稀有得多，價格卻遠遠不如。需求大到可以壓過稀有度，這個例子證明需求的影響很大，不是很小。副詞題不要只憑語感，要看它與整段論證的方向合不合。
merely（僅僅）：把影響力縮到最小，與 Furthermore 追加重要因素的功能相衝突，也被後面的例子直接推翻。hardly（幾乎不）：語意相反，等於說需求幾乎不影響價值，那整段就白寫了。roughly（大略地、粗略地）：修飾的是數量或說法的「精確程度」（roughly 100 dollars 大約一百美元），不是修飾影響的強弱。
greatly influence（大大影響）、have an influence on（對…有影響）、under the influence of（受…影響）、hardly ever（幾乎從不）、roughly speaking（大略地說）、not merely... but also（不僅…而且）。
For coin collectors who invest money in coins, the value of a coin is determined by various factors. First, scarcity is a major determinant. 21 a coin is, the more it is worth. Note, however, that rarity has little to do with the 22 of a coin. Many thousand-year-old coins often sell for no more than a few dollars because there are a lot of them around, 23 a 1913 Liberty Head Nickel may sell for over one million US dollars because there are only five in existence.
Furthermore, the demand for a particular coin will also 24 influence coin values. Some coins may command higher prices because they are more popular with collectors. For example, a 1798 dime is much rarer than a 1916 dime, but the 25 sells for significantly more, simply because many more people collect early 20th century dimes than dimes from the 1700s.