Fill in the blank with "foot"or"feet"(脚是有用的,一只脚和两只脚用处不同,查查他们

Fill in the blank with "foot"or"feet"(脚是有用的,一只脚和两只脚用处不同,查查他们的意思,再填空)
1.Every time he opens his mouth he puts his( )in it.
2.The two brothers have been so lazy in the past fe months.They'll have to put their best( )forward if they want to pass that exam now.
3.He's joined the sports club in the hope of getting a( )in one of the teams.
4.It's nice to put your( )up after a long day's work.
5.He complained that he put a( )wrong,and the manager was down on him at once.
6.We went all the way to the Summe Palace on( ).
7.The money we're collected oght to set the young man on his( )again.
8.It's nice to sit down after being on your( )all day.
请翻译