3. State which of the italicized units are phraseological and which are free word groups:1) He asked to warm a glass of milk but they left it rather cold. 2) The music left me rather cold. 3) Where do you think you lost your purse? 4) I could not stand that noise any longer. I lost my temper. 5) Keep the butter in the refrigerator. 6) Keep the eye on the child.

1) He asked to warm a glass of milk but they left it rather cold.
The phraseological unit in this sentence is "left it rather cold". This phrase is a fixed expression that means they did not warm the milk as requested.

2) The music left me rather cold.
The phraseological unit in this sentence is "left me rather cold". This phrase is a fixed expression that means the music did not evoke any strong emotions or excitement.

3) Where do you think you lost your purse?
The word group in this sentence is not phraseological. It is a simple question asking for the location where the purse was lost.

4) I could not stand that noise any longer. I lost my temper.
The phraseological unit in this sentence is "lost my temper". This phrase is a fixed expression that means becoming very angry or losing control of one's emotions.

5) Keep the butter in the refrigerator.
The word group in this sentence is not phraseological. It is a simple instruction telling someone to store the butter in the refrigerator.

6) Keep the eye on the child.
The phraseological unit in this sentence is "keep an eye on". This phrase is a fixed expression that means to watch or monitor someone closely.

In summary, the phraseological units in the given statements are:
1) left it rather cold
2) left me rather cold
4) lost my temper
6) keep an eye on