There is a real possibility that these animals could be frightened,__B__ a sudden loud noise.
A.being there B.should there beC.there wasD.there having
答案是第二项,可是不明白这里为什么选它,这是什么结构,那位帮帮我呀.
人气:232 ℃ 时间:2019-10-19 07:33:10
解答
虚拟语气 省略
完整的是
if there should be a sudden noise.
如果突然有一个很大的声音 动物们真的有可能被吓到
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