41.Go/keep on a diet

　　Im on a diet recently， so Id better skip the dessert.

　　42.Have a hard/difficult time with sth.

　　43.Have a temperature/fever

　　44.Have the final say：有決定權

　　45.Hold up：堵塞i，持槍攔截，舉起，攔截

　　Did you hear that the convenience store next to the gas station was held up last night?

　　46.In a good/terribly /mood

　　47.In the long run：長期來看

　　It seems very experience. But in the long run it will save the money on the maintenance.

　　48.Join in：參與

　　49.Keep between the two of us:/keep a secret

　　50.Keep fit