2. 考研
  3. Millions of Americans flock to their drugstore to buy vitamins and minerals, ______that these pills can help to prevent serious

Millions of Americans flock to their drugstore to buy vitamins and minerals, ______that these pills can help to prevent serious

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问题 Millions of Americans flock to their drugstore to buy vitamins and minerals, ______that these pills can help to prevent serious illnesses.
选项 A、convincing
B、convinced
C、to convince
D、to be convinced
答案B
解析 convince一词属于及物动词，后面要求跟宾语。一般的用法是跟一个直接宾语和一个间接宾语，即convince somebody of sth．。此句中的somebody是millions of Americans，在句中作了主语，所以con vince应该用被动语态形式，being convinced和convinced都算对。A项的convincing不是被动语态，而C和D选项的不定式都包含将来时间的概念，在本句话中的用法和意思都不对。
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