用介词填空 A lot of people stayed [ ]the open air near their houses last night
问题描述：
用介词填空 A lot of people stayed [ ]the open air near their houses last night
答
in
in the open air:在户外，在野外
答
at
答
填in.虽然stay可以与at和in搭配使用.但是in the open air意思是在户外.是固定搭配.所以这里应该填in.
答
in the open air
在户外 固定短语
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答
in
答
in the open air填in