1.Go/keep on a diet
I’m on a diet recently, so I’d better skip the dessert.
2.Have a hard/difficult time with sth.
3.Have a temperature/fever
4.Have the final say:有决定权
5.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)
6.In a good/terribly /mood
7.In the long run:长期来看 恒星英语学习网
It seems very experience. But in the long run it will save the money on the maintenance.(1995-6)
8.Join in:参与
9.Keep between the two of us:/keep a secret
10.Keep fit