Though he is clever,_____ he doesn't work hard.yet可以填吗?yet做副词讲有但是的意思,这里可不可以把它看作动词呢?

though yet 的用法Though he is clever,_____ he doesn't work hard.A.but B./ C.yet D.B and C是否可以选D how clever a boy he is!how clever he is! 是How clever he is!还是What clever he is! ____ clever boy he is He is (real) clever,isn't he? clever a boy as he 有一单选：_____________,he can't answer all the questionsA.clever boy as he is B.clever a boy as he is选项是A 该句型冠词省略但是为什么不能选B呢?我查证的语法条例如下：在as,though 引导的让步 meaning?He is more clever than naughty. What a clever boy he is! He is clever（改为一般疑问句） he is clever.(改为否定疑问句） he is _________boy .选择题A.a clever quite B.quite a clever C.a quite clever D.quite clever a I ______ (think) he is a clever boy ,is he He considers he is clever enough.He ____ ____ clever enough. he is so clever that he can answer the question He is clever.He can finish his homework___(easy) He is very clever.H_____,he isn't careful He is very clever,he often has o_____ ideas. I think he is a clever boy.(改为同义句)I____ ____ he ____a clever boy.