John has put on so much weight recently that his mother has to all his trousers to his m

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(答案→)A. let out
B. give away
C. bring in
D. make up
解析：let out 意为“放掉，泄露，放大，出租”；give away 意为“送掉，分发，放弃，泄露, 出卖，让步”；bring in 意为“生产，挣得，介绍引进”；make up 意为“弥补，虚构，缝制，整理，和解，编辑，化妆”。