They have studied English for 20 years. They began to study English _______.20 y

游客2025-06-23 17

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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