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我做英语题有几道不会的,希望英语好的帮忙解答下,不算很难哦

来源:学生作业帮 编辑:作业帮 分类:英语作业 时间:2024/05/06 01:20:38
我做英语题有几道不会的,希望英语好的帮忙解答下,不算很难哦
1、____ my return,i learned that Professor Smith had been at the Museum and would not be back for several hours.
A、At
B、On
C、With
D、During

答案是B,为什么不选D?

2、There is a real possibility that these animals could be frightened,____ a sudden loud noise.
A、being there
B、should there be
C、there was
D、there having been
答案是B,为什么?
1选B,因为on my return 意思是“在我回来的时候”,
2选B,因为:should there be 这里是对将来的虚拟语气结构,只是省略了if后将should提前了.还原的话是 if there should be a sudden loud noise.最好是不要替换,因为这里的这个结构是和前面的 could be frightened 一起的.