He could speak English fluently because he __________ it for four years when he was a college studen...
2022-12-10 09:14:40 38次 2015届辽宁省丹东市高一上学期期末考试英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
He could speak English fluently because he __________
it for four years when he was a college student.
A．had studied B．have been
studying C．studied D．was studying
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