By the 10 century, Old English __________ the official language of English. A. has become B. became ...
2022-10-02 01:55:44 186次 江苏省南通市2016-2017学年高一下学期期末考试英语试卷 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
By the 10 century, Old English __________ the official language of English.
A. has become B. became
C. had become D. would become
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