The bus driver insisted that he _____ at a normal speed and therefore _____ for the child's death.[ ]

A. drive; not answer

B. was driving; shouldn't answer

C. should drive; shouldn't have answered

D. drove; shouldn't answer

逻辑“或”算符是用来组配（）

A、不同检索概念，扩大检索范围

B、相近检索概念，扩大检索范围

C、不同检索概念，缩小检索范围

D、相近检索概念，缩小检索范围