2. 外语
  3. Millions of Americans take vitamins and minerals, ______that these pills can help to prevent serious illnesses.

Millions of Americans take vitamins and minerals, ______that these pills can help to prevent serious illnesses.

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问题 Millions of Americans take vitamins and minerals, ______that these pills can help to prevent serious illnesses.
选项 A、convinced
B、convincing
C、to convince
D、to be convinced
答案A
解析 本题考查非谓语动词。句意：数以百万计的美国人服用维生素和矿物质，他们相信这些药丸可以帮助预防严重的疾病。convinee属于及物动词，后面要跟宾语，一般用法是跟一个直接宾语和一个间接宾语，即convinee sb．0f sth．。此句巾的sh．是mill。ions0f Americans，在句中作主语，所以convinc：e应该用被动形式。故本题选A。
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