题目

Nowadays many parents leave their work in order to provide necessary help for their children when they reach Senior Three. They usually live with their children in the rented apartment to keep their children (76)_____(陪伴).There are positive effects as well as (77)________effects over the issue.     The advantage is obvious. With parents preparing food and doing all the washing, children can eat(78)_________(有规律) and have more time to study and enjoy themselves. Most of(79) ______, children can enjoy the love of their parents every day. However, it costs more money and gives已知===k，则k=_________。