根据句意,用所给单词的适当形式填空。
Daniel is writing a _______ (complain) letter to the newspaper.
The public transport system is _______ (special) designed to be comfortable.
Take exercise one hour a day, you’ll become ________(healthy)than before.
After working hard for many years, Jim became the CEO of a company in his _______(fifty).
Please help_________(you) to some chicken, Tom and Jim!