用括号内所给词的适当形式填空。 1. Our class play soccer for a week without _______ (stop). 2. It is one of the highest _______ (build) in this city. 3. Liu Yutian is the first person to walk the whole _______ (long) of the Great Wall. 4. I don't know how to make the problem much _______ (easy). 5. Every morning Jim is the _______ (early) student in his class.
