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.