the suspect couldn't answer the question_____he had been doing when the criminal case took place

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
英语人气:780 ℃时间:2019-08-22 09:03:49
优质解答
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的词,只有what了,同位语从句中that可以省略,what sb.do就是某人所做的事
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