to be on the safe side I am almost sure of the pronunciation of this name, but to be on the safe side let us consult the pronouncing dictionary.
to play the piano (the violin, the harp) She plays the piano very well.

 
it is out of the question “Will you go to the theatre tonight?” “It’s out of the question. I have lots of things to do.”
to take the trouble to do something You had a difficult text to translate and you did not take the trouble to consult the dictionary.
in the original You know English well enough to read Dickens in the original.

 
to keep the house She has a cold and will have to keep the house for a couple of days.

 
To keep the bed She has a bad cold and will have to keep the bed for a couple of days
on the whole On the whole Tom is a pleasant fellow, but sometimes he has whims.
the other day (refers to the past) I met him the other day.
on the one hand…on the other hand On the one hand he certainly excites suspicion, but on the other hand we have not enough evidence against him. (Oppenheim)
to tell (to speak) the truth He always speaks (tells) the truth.
to tell the truth To tell the truth, I don’t like the girl.