The subjects we have at school biology.A. includingB. includeC. includedD. to include

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A. including
(答案→)B. include
C. included
D. to include
解析：此题要分清句子成分，主语是The subjects，we have at school是定语从句，整个句子缺少谓语动词，根据题中的时态应用一般现在时态所以选B。