The mother didn't know ________ to blame for the broken glas
1个回答

答案D

名词性从句的引导词中,what,who,how,when等词在从句中均充当成分,在从句中作主语、宾语及表语时用what,指人用who,作状语表方式、时间及地点时用how,when,where,引导词+不定式结构相当于简略式从句.需指出的是,that引导名词性从句时引导词在从句中不作任何成分,what只能引导名词性从句,不能引导定语及状语从句."