想问一道英语句型转换题,Has he ever slept outside (变同义句)Has he ever slept _____ the _____ air 你们一个是 是加了过去分词的,一个是没加的,谁是正确的啊?

问题描述:

想问一道英语句型转换题,
Has he ever slept outside (变同义句)
Has he ever slept _____ the _____ air
你们一个是 是加了过去分词的,一个是没加的,谁是正确的啊?

in open

in ... opening

in,open
in the open air 在户外 (固定短语)