( )he didn't understand was ( )manystudents missed his class

He didn't understand a thing but nodded his head as if he di The reason why I was sad was that he didn't understand me. He didn't know which hat was his.还是应该用：He didn't know which _____her before,he didn`t know she was his aunt. He said something () i didn't understand. we didn't understand( )he said meant He didn't understand that business letter because it was wri He didn’t understand the _______ question,so there was a ___ He didn’t understand the _______ question, so there was a __ bob said he was going to join our club but he didn't.he()his ---Tom didn't pass the exam.---Yes.He is _____ in his class. he didn't understand you,did he 回答