He was obliged to the trade of shoemaker.A. take on B. take inC. take upD. take down

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A. take on
B. take in
(答案→)C. take up
D. take down
解析：考查词组辨析：A. take on 承担，呈现，B.take in理解，吸收，欺骗C. take up占据，从事，D. take down记下，句意：他被迫从事鞋匠的事情。选C。