The car ran over a dog and a boy_____just crossing the streetA.who was B.whom was C.that was D.that were 为什么选D?我做的定语从句专题 大部分选项都是who whom that which whose when where why as 这道题怎么有was、were?

问题描述:

The car ran over a dog and a boy_____just crossing the street
A.who was B.whom was C.that was D.that were 为什么选D?
我做的定语从句专题 大部分选项都是who whom that which whose when where why as 这道题怎么有was、were?