A,that B,whether C,what D,where
选C，同位语从句中有个doing，它是及物动词，必须得接个事物性质氏和袭的词，只有what了，同位语从句中that可以省略棚搏，what sb. do就是某人所做的歼兄事
what做doing的宾语，可译为该嫌犯不能说出案发时他在做什么
the suspect couldn't answer the question
the suspect couldn't answer the question_____he had been doing when the criminal case took place
A,that B,whether C,what D,where
选C，同位语从句中有个doing，它是及物动词，必须得接个事物性质氏和袭的词，只有what了，同位语从句中that可以省略棚搏，what sb. do就是某人所做的歼兄事
what做doing的宾语，可译为该嫌犯不能说出案发时他在做什么
A,that B,whether C,what D,where
选C，同位语从句中有个doing，它是及物动词，必须得接个事物性质氏和袭的词，只有what了，同位语从句中that可以省略棚搏，what sb. do就是某人所做的歼兄事
what做doing的宾语，可译为该嫌犯不能说出案发时他在做什么