◎ 题干
—What's wrong with your face?
—A bee has stung it and it is ________.
[     ]
A. swelled up  
B. swelling up
C. swelling down  
D. swelled down
◎ 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“—What's wrong with your face?—A bee has stung it and it is ________.[ ]A. swelled upB. swelling upC. swelling downD. swelled down…”主要考查了你对  【动词短语】【过去进行时】  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。