According to school bus safety rules, when a school bus stops on the road to _____or pick up students, other vehicles behind it must stop to wait. 

As a Senior 3 student，if you want to get a good result，it is important to ___a good state of mind for the coming entrance examination．

Some farmers are no longer _____ with two harvests per year; they are now striving for three．

Once he has _______, nothing can change his mind.

When I was doing shopping last Sunday, I ______ Mr. Smith in the street.