Sandy is over there.改为疑问或否定句

Sandy is over there.改为疑问或否定句 —Who’s singing over there — ________ is Sandy’s sister. 1.Who’s singing over there — ________ is Sandy’s sister.A.That B.It C.She D.This What is over there? the man is over there She is over there意思 What is over there?N______. What is happend over there? over is village a there there (.) there is a baby horse over there. the girl is over there.对over there提问! The boy is over there对over there提问 The toilet is over there 对（over there)提问 He is sstanding over there 对over there 提问 My mother is over there.对over there提问. This is ( ) car.( )is over there This is her bike .( ) is over there who's singing over there?______is Sandy's sister.A That B It C She D This 应该选哪个?