[文法] 幾個句子
想請問各位大大以下句子
1. Nutritionists recommend that each individual take sufficient amounts
of vitamin C so that may he may not contract svurvy as well as other
diseases attributed to the lack of the nutrient.
第一行中的take是否應該要用第三人稱單數 即takes
2. Historians are still mystified by the question how some ancient
civiliztions disappeared suddenly in history.
第一行中的how為何不能使用why
3. __________, the cell bodies that control the heredity of an animal or
a plant.
(A) DNA is the chief material in chromosomes
(B) The chief material in chromosomes is DNA
(C) In chromosomes DNA is the chief material
(D) In chromosomes the chief material is DNA
正確答案是A 想請問其他選項為何不行
謝謝回答
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