It’s___(reasonable)to expect people to work more than 60 hours a week.
The goal of the course is to ___(rich)our understanding of other cultures.
I _____him 150 dollars and must pay him back tomorrow.
现阶段公有制范围内实行按劳分配的主体是（）
A task of the post office staff is to_ (class) mail according to the places it is to go
