题干
My sister went back to Shanghai last Sunday．(改为同义句)
My sister ____ ____ Shanghai last Sunday．
答案(点此获取答案解析）
returned,to
My sister went back to Shanghai last Sunday．(改为同义句)
My sister ____ ____ Shanghai last Sunday．
，
为两个单位向量，下列四个命题中正确的是( )
