He looks unhappy today.What ____(happen)to him? 请问横线上填happened还是has happened,为什么?谢谢

He looks unhappy,____?反义疑问句 he looks unhappy what( happen) to him 填啥些原因 Mary looks unhappy.同意句Mary looks unhappy.Mary _______ ______ _______ unhappy Mary looks unhappy.Mary _____ _____ ______ unhappy.同意改写 i don’t know the rason why he looks unhappy today 定语从句 拆分句子i don’t know the rason why he looks unhappy today拆分成两个句子帮一下我谢谢在线等各路英语高手加油 He looks unhappy today.What ____(happen)to him? 请问横线上填happened还是has happened,为什么?谢谢 He felt unhappy,_____he? He looks _ at his son A .hapy B.more happy C.HaHe looks _ at his son A .hapyB.more happyC.HappilyD.unhappy原因 she looks unhappy=she___ ___ ___unhappy He looks He looks so unhappy that he seems to _____ the sad news.空格处用know还是have known,为什么呢? He looks unhappy.Yes,but he can't say what it is ____is bothering him.A.as B.that C.what D.which he feels unhappy 还是unhappily he is unhappy 反义疑问句 He made us feel unhappy. 英文题目[选项题]!-Would you tell me _____ with Tom?-He looks like unhappy.A.what's the matter B.what wrong isC.the matter 高中英语单选 -How unhappy your roommate looks!-Yes,but he is not willing to tell me what it is _troubling him.空里为什么不能填which 改为反义疑问句they are built a new one,______?she looks unhappy,______?he never did his homework,_____?let us go out,_______?