◎ 题干
This is a busy port with so many ships _____ every day.
[     ]
A. come and go
B. to come and go
C. coming and going
D. come and gone
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“This is a busy port with so many ships _____every day.[ ]A. come and go B. to come and go C. coming and goingD. come and gone …”主要考查了你对  【现在分词】【独立主格结构】  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。