如图 竖直墙上a点用ab:英语选择题

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He used to _____ a model for several painters.
A. serving as B. be served as
C. serve as D. being served as
Could you _____ me a few minutes? I want to talk about _____ a flat with you.
A. share, sparing B. spare, sparing
C. share, sharing D. spare, sharing
麻烦大家帮忙了.....
一定要有语法分析哦..最好是老师的专业回答!

used to do sth
意思是过去常常
区别于 be used to doing sth
意思是习惯于
第一题要用被动语态
选B

share有分享之义
spare有空闲之义
about 是介词,后面跟动名词
选D