The human body is composed of organs, each ______ a definite job to do.

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问题 The human body is composed of organs, each ______ a definite job to do.

选项 A、has
B、had
C、having
D、is having

答案C

解析 独立主格结构题。分析句子结构可知,本句需要一个非谓语动词结构在句子中作状语,而each having a definite job to do就是独立主格结构作状语,故选项C正确。
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