---K-E-Y, key.A. What’s this?B. Spell “key”,please.C. What color is the key?D. This is

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A. What’s this?
(答案→)B. Spell “key”,please.
C. What color is the key?
D. This is a key.
解析：根据答语可知这是对单词的拼写。有选择项的提示可知选择B。