There used to be a clean river.为什么不是There used to have a cle

There used to be a clean river.为什么不是There used to have a cle 请问 There used to be a park. there used to be a church here ,----? 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_(is)a clean river before. 31.There ______ some houses near the river.A.were used to be 英语翻译1.This river used to be clean.2.Have you got used to wor There used to be a tower here,___?A.usedn't it B.used there There used to be _________ near the river. there used to be a cinema here before the war , ------------ there used to be a hospital here,________?