◎ 题干
The professor________at 8 o’clock,but he has not shown up yet,which worries all of us.
[     ]
A.was supposed to arrive  
B.must have arrived
C.might have arrived  
D.was supposed arriving
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“The professor________at 8 o’clock,but he has not shown up yet,which worries all of us.[ ]A.was supposed to arrive B.must have arrivedC.might have arrived D.w…”主要考查了你对  【动词短语】【动词】【一般过去时】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。