1.When walking along the river,I picked up many beautiful stones.改同义句 When I _____ _____ along
题目
1.When walking along the river,I picked up many beautiful stones.改同义句 When I _____ _____ along
答案
因为是两个空,所以应该是：
When I __was___ __walking___ along the river,I picked up many beautiful stones.
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