She soon French when she went to live in France.A. set upB. took upC. put upD. picked up

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A. set up
B. took up
C. put up
(答案→)D. picked up
解析：句意：她她去法国居住时很快学会了法语。Set up建立，搭建；take up（跟着）唱、叫等，拿起，从事；put up举起，张贴；pick up（自然而然地）学会，拾起，用车接某人等。根据题意选D。