根据句意和语境，用所给单词的适当形式填空。

1．Rosa eats ________ (1ittle)food than her sister．

2．There are many tall ________ (build)in Shanghai．

3．Paris is one of the ________ (lively)cities in Europe．

4．My brother is a stamp fan．He enjoys ________ (collect)stamps．

5．Most people like easy jobs and don’t like to do the ________ (pleasant)work．