对不起，前面没有看清题，现在更正一下：
Quiet student as he is, he talks a lot about his favourite singers after class. (有人说：如果名词前有形容词做定语，要加冠词，但是，更多的人认为还是不加冠词，06年重庆高考英语卷中就有类似的题，答案是不加冠词的。）
as引导的让步状语从句须采取倒装结构，主要有以下几种形式：
1) 副词置于句首。如：
Much as I like it (＝Although I like it very much), I will not buy it．
2) 动词原形置于句首。如Wait as you may(＝Although you may wait), he will not see you．
3) 形容词或名词置于句首。注意：如果表语是名词，则要省掉冠词，如：
Proud as the nobles are (＝Although the nobles are proud), they are afraid to see me．
Child as he is (＝Although he is a child), he can tell right from wrong．
希望对你有所帮助。
哈哈，我修改了一下就到了后面，有人抄了我的答案，不过我还是谢谢他，他说我的答案不错。