Question

【题目】There used ________ a small river in front of my house.The water in it was clean.

A. be B. to be

C. to being D. is

Answer 1

【答案】B

【解析】

句意：我家门前过去有一条小河，河里面的水很清澈。be动词原形；to be动词不定式；to being介词to后跟动名词形式；is是。根据句意可知，这里表示“过去曾经有……”应用there used to be，故选B。