There used to be a tower here,___?A.usedn't it B.used there

There used to be a tower here,___?A.usedn't it B.used there There used to be a tall tree here,usedn't it?(哪里错了?） there used to be a shoe factory over there,usedn't there? There ___ a museum here. A.used to B.used to do C.used to ha () There used to be a school here,___? there used to be a church here ,----? He said there ___ be a hospital here. A would B used to C mu there used to be a hospital near here 变否定句 there ___ ___ be there used to be a reastaurant here 与there used to be here a there used to be a reastrant here 与there used to be here a r There used to ____(be) a theater here ,didn't there? there used to be a cinema here before the war , ------------