These nets are recognized by medical experts as the best hope for 22 the spread of malaria－Cambodia's most deadly disease. 23 the Health Ministry and the Malaria Center, The CAMBODIA DAILY will distribute the nets to the most 24 areas of the country. 25 to this campaign and save three lives for only $5, send your donation to: American Assistance for Cambodia, P.O.
答案：(A) affected
affected 是「受影響的」，the most affected areas 指疫情最嚴重、受害最深的地區；frequent（頻繁的）、effective（有效的）、included（被包含的）語意都不合。
答對率 29%。
affect 與 effect 的意思不難分，難在拼字——整個字只差第一個字母，而且發音極接近（affect /əˈfekt/、effect /ɪˈfekt/，字首都是輕讀），聽寫時幾乎分不出來。
前面有 a／an／the 或形容詞 → 要名詞 → effect（a bad effect、the greenhouse effect）；在主詞之後、後面還接受詞 → 要動詞 → affect（Smoking affects your health.）。輔助記法：a-ffect 是 action（動詞），e-ffect 是 end result（名詞）。
the most ___ areas 是「最…的地區」，前一句才說蚊帳是對抗瘧疾的最大希望，所以是「受害最深」的地區——affected 是過去分詞當形容詞，「受到影響的」。
the most affected areas（受害最深的地區）、be affected by（受…影響）、have an effect on（對…有影響）、side effects（副作用）、take effect（生效）。
The CAMBODIA DAILY is launching a world-wide campaign to wipe out malaria in Cambodia. You can help save three lives for only $5 by supporting this effort. Each and every dollar you contribute will go 21 the purchase of family-sized insecticide-treated mosquito nets costing $5 each. These nets are recognized by medical experts as the best hope for 22 the spread of malaria－Cambodia's most deadly disease.
23 the Health Ministry and the Malaria Center, The CAMBODIA DAILY will distribute the nets to the most 24 areas of the country. 25 to this campaign and save three lives for only $5, send your donation to: American Assistance for Cambodia, P.O. Box 2716, GPO, New York, NY 10116. Credit Card donations are also accepted.