10. He started _____ last month to fit into his school uniform, and he has lost 3 kilograms so far.A. being allergic toB. being crazy aboutC. settling inD. losing weight

本题考查短语辨析，解题思路是根据句子语境，分析每个选项的含义，看哪个选项能使句子逻辑通顺。

• A选项“being allergic to”：意为“对……过敏”。若选此项，句子“He started being allergic to last month to fit into his school uniform”表达的是他开始对某事过敏来适应校服，这在逻辑上不合理，因为过敏与适应校服之间没有直接关联，所以A选项不符合题意。
• B选项“being crazy about”：意思是“对……着迷”。“He started being crazy about last month to fit into his school uniform”表示他开始对某事着迷来适应校服，着迷与适应校服之间不存在必然的逻辑联系，所以B选项也不正确。
• C选项“settling in”：有“安顿下来；适应新环境”的意思。“He started settling in last month to fit into his school uniform”说他开始安顿下来或适应新环境来适应校服，这种表达逻辑不清晰，安顿或适应新环境与适应校服没有直接的因果关系，所以C选项不合适。
• D选项“losing weight”：是“减肥”的意思。“He started losing weight last month to fit into his school uniform, and he has lost 3 kilograms so far.” 句子表达他上个月开始减肥以穿上校服，到目前已经减了3公斤，这在逻辑上是合理的，减肥是为了能穿上校服，所以D选项符合题意。