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职称英语
They have studied English for 20 years. They began to study English________
They have studied English for 20 years. They began to study English________
游客
2025-06-22
25
管理
问题
They have studied English for 20 years.
They began to study English________.
选项
答案
20 years ago
解析
考查现在完成时和一般过去时转换。20年前开始,相当于已经学了20年。
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