it contains enough iodine to block radiation.many people bought large quantities of iodised salts in China．( )A．BelievingB．BelievedC．Being believedD．Having been believed 题目和参考答案——青夏教育精英家教网—

18． it contains enough iodine to block radiation，many people bought large quantities of iodised salts in China．（　　）

	A．	Believing		B．	Believed
	C．	Being believed		D．	Having been believed

分析由于相信盐里面含有足够的碘能够阻隔辐射，在中国，很多人购买了大量的加碘食盐．

解答答案：A
分析句意可知，"it contains enough iodine to block radiation"在句中作原因状语，动词believe与其逻辑主语many people 构成主谓关系，故用现在分词作状语表示原因；C 现在分词被动语态的一般式 D 现在分词被动语态的完成式，以上两个选项都表示被动关系，用在此处不合句意，故选A

点评本题考查了现在分词作原因状语的用法．做本题时，首先应根据句意，判断选项中的动词与其逻辑主语的关系；其次应掌握现在分词，现在分词被动语态的一般式以及现在分词被动语态的完成式之间的用法区别．

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