Which of the following sentences doesn’t contain(包含) an object clause（宾语从句）?A.Many people believe robots will do most of our work.B.Scientists should be able to develop plants that grow on Mars.C.People think that humans on Mars have to wear special boots to make themselves heavier.D.We all know the next Olympic Games will be held in Beijing.
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B解析试题分析：根据各个选择项可知B不是宾语从句，它只是个简单句。A和D是that引导的宾语从句，其中that给省略了；C也是that引导的宾语从句。考点：宾语从句的结构点评：置于动词、介词等词性后面起宾语作用的从句叫宾语从句。宾语从句的语序必须是陈述语序。谓语动词、介词、动词不定式，v.-ing形式后面都能带宾语从句。有些形容词（afraid,sure,glad等）之后也可以带宾语从句。其基本特点是：宾语从句可以作及物动词、介词及形容词的宾语。宾语从句的语序一律用陈述句语序。连接词that引导宾语从句在句中无词义，不充当句子成份，多数情况下可以省略。whether 和 if 都可引导宾语从句，但 whether后可紧跟or not；whether从句可作介词的宾语。