◎ 题干
When you are home,give a call to let me know you ________ safely.
[     ]
A. are arriving  
B. have arrived
C. had arrived  
D. will arrive
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“When you are home,give a call to let me know you ________ safely.[ ]A. are arrivingB. have arrivedC. had arrivedD. will arrive…”主要考查了你对  【现在完成时】  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。