Food safety is one of the problems now all over the world.A．discussedB．to b
题型：不详难度：来源：
Food safety is one of the problems now all over the world.| A．discussed | B．to be discussed | | C．being discussed | D．having been discussed |
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答案
| C |
解析
试题分析：考查分词做定语。本句中的动词discuss与名词problems之间构成被动关系，因为本句有now说明这个问题正在被讨论，用现在分词的被动语态。句意：现在食品安全是一个全世界都正在讨论的问题。故C正确。
点评：：当分词做定语的时候，如果构成分词的动词与名词构成主动关系，就使用现在分词做定语；当二者构成被动关系，使用过去分词做定语。单独的一个分词做定语要放在名词的前面，分词短语做定语要放在分词的后面。 |
举一反三
It was reported that a little boy under a destroyed house for three days was pulled out alive at last.| A．trapped | B．being trapped | C．was trapped | D．had been trapped |
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