then did they understand that it was their own fault. [ ] A. Only B. By then C.
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![then did they understand that it was their own fault. [ ] A. Only B. By then C.](/pic/43_868313.jpg)
_________ then did they understand that it was their own fault.
[]A.Only
B.By then
C.Since
D.Till
试题答案
答案:A
![then did they understand that it was their own fault. [ ] A. Only B. By then C.](/pic/43_868313.jpg)
_________ then did they understand that it was their own fault.
[]A.Only
B.By then
C.Since
D.Till
答案:A