(2013·重庆部分学校高三联考)At the edge of the grass，there's a sign saying“________ the grass”．

Recently,  many parents choose to rent a house near schools and ______their children during their school years.

You’d better        fatty food if you want to stay slim

Most foreigners feel uncomfortable when ____ in the street. 

I saw Bob play the piano at John's party and on that ________ he was simply brilliant.