3.On Friday, Russia said it was considering suspending all such adoptions after a 7-year-old Russian boy was sent back to Moscow unaccompanied when his adoptive American family rejected him.
参考翻译:
周五,一名7岁的俄罗斯男孩在无人陪伴的情况下被他的美国领养家庭送回莫斯科,俄罗斯表示将考虑终止所有类似的收养行为。
结构分析:
这句话的前半部分是主干。after后是时间状语从句。when his adoptive American family rejected him也是时间状语从句,但是这里的状语补充说明的是was sent back to Moscow的时间。