英语六级听力复习之实用词组(6)

　　keep on ones toes - be ready for action; prepared

　　knock oneself out - make a great effort

　　make ends meet - to get just enough money for noes needs

　　make out - manage;get along

　　mean to - intentional; on purpose

　　keep onesfingers crossed - wish that nothing goes wrong

　　in the dark - keep someone without knowdge; information from somenoe

　　hold off - delay;postpone

　　hop to it - get started on something quickly