I happened to meet my teacher last Friday. [ ] A.by accident B.by mistake
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![I happened to meet my teacher last Friday. [ ] A.by accident B.by mistake](/pic/43_747630.jpg)
I happened to meet my teacher ________ last Friday.
[]
A.by accident B.by mistake
试题答案
答案:A
![I happened to meet my teacher last Friday. [ ] A.by accident B.by mistake](/pic/43_747630.jpg)
I happened to meet my teacher ________ last Friday.
[]
A.by accident B.by mistake
答案:A