Over the past l00 years，sea level      steadily as a result of global warming．

Large quantities of water , as well as some other timely help including a medical team, _____  since the serious drought hit Yunnan Province. 

Alice, together with two boys,        for having broken the rule.

 —How long has this bookstore been in business? —_______ 1996.

When he was alive, the old scientist used to say that knowledge ______ from practice and he gained his experience by doing a lot of practical work.