句型转换（本题共5小题；每小题1分，满分5分）
请根据要求改写下列句子，每空一词。
He has already found something unusual about the colourful birds. (改为否定句)
He _________ found __________ unusual about the colourful birds yet.
The boy is afraid of making a speech in front of many people.(就划线部分提问)
_________ is the boy afraid of ________?
He offered us some useful advice yesterday.   (改为感叹句)
_________ ________ advice he offered us yesterday!
Many students ask me how they can solve their problems.  (改为同义句)
Many students ask me ________ ________ solve their problems.
The robbers forced the man to lie on the floor.   (改为被动语态)
The man _________ _________ to lie on the floor by the robbers.