41.Go/keep on a diet
   
    I’m on a diet recently, so I’d better skip the dessert.
   
    42.Have a hard/difficult time with sth.
   
    43.Have a temperature/fever
   
    44.Have the final say:有决定权
   
    45.Hold up:堵塞i，持枪拦截，举起，拦截
   
    Did you hear that the convenience store next to the gas station was held up last night?(2005-6)
   
    46.In a good/terribly /mood
   
    47.In the long run:长期来看
   
    It seems very experience. But in the long run it will save the money on the maintenance.(1995-6)
   
    48.Join in:参与
   
    49.Keep between the two of us:/keep a secret
   
    50.Keep fit