问题
选择题
I couldn't imagine ________ difficult it was for these badly injured victims to make it to the hospital.
A．when
B．how
C．what
D．where
答案
答案：B
答案：B 考查名词性从句。分析句子结构可知，动词imagine的宾语从句中，中心词是形容词difficult，所以用连接词how引导。