61. have a hunch - have an idea based on feelings rather than reason

　　62. hold off - delay;postpone

　　63. hop to it - get started on something quickly

　　64. hit it off - get along well with someone

　　65. ill at ease - uncomfortable

　　66. in hot water - in trouble

　　67. in the air -uncertain

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

　　69. in the lone run - looking toward the future; eventually

　　70. ins and outs - all the details; the various parts and difficulties to be seen

　　71. iron out - remove the difficulties or find an answer for

　　72. jump to conclusions - arrive too quickly at a decision or opinion

　　73. keep an eye on - watch closely

　　74. keep one’sfingers crossed - wish that nothing goes wrong

　　75. keep on one’s toes - be ready for action; prepared

　　76. knock oneself out - make a great effort

　　77. learn the ropes - learn the rules and routines of a place or activity

　　78. little by little -gradually

　　79. make ends meet - to get just enough money for noe’s needs

　　80. make out - manage;get along