用所给词的适当形式填空1.I heard Li Lei _____(write) five letters to his friends since last month.

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/11 05:55:06
用所给词的适当形式填空1.I heard Li Lei _____(write) five letters to his friends since last month.

用所给词的适当形式填空1.I heard Li Lei _____(write) five letters to his friends since last month.
用所给词的适当形式填空1.I heard Li Lei _____(write) five letters to his friends since last month.

用所给词的适当形式填空1.I heard Li Lei _____(write) five letters to his friends since last month.
I heard Li Lei _had written____(write) five letters to his friends since last month.
在听说之前动作已完成,所以用过去完成时