请根据括号内的要求改写下列句子.
问题描述：
请根据括号内的要求改写下列句子.
1.He is a clever boy.( 改为由 what 引导的感叹句).2.The book is very interesting.( 改为由How引导的感叹句).
答
what a clever boy he is!
how interesting the book is!