◎ 题干
-It's the second time that I ________ to Shanghai.
-What great changes!It's ten years since I ________ it last time.
[     ]
A.have been; left  
B.had been; left
C.am; had left  
D.come; had left
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“-It's the second time that I ________ to Shanghai.-What great changes!It's ten years since I ________ it last time.[ ]A.have been; leftB.had been; leftC.am…”主要考查了你对  【一般过去时】【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。