Select the most appropriate meaning of the underlined idiom.

The new intern is a greenhorn and thus his superiors take advantage of him

Inexperienced

The most appropriate meaning of the underlined idiom in the sentence is (1) Inexperienced.

The idiom "greenhorn" is used to describe someone who is new to a job or situation and does not have much experience. The new intern is inexperienced and his superiors take advantage of him because they know that he does not know what he is doing.

The other options do not fit the meaning of the idiom.

• Jealous means to feel envious of someone else's success or possessions.
• Overenthusiastic means to be too excited or eager about something.
• Sick means to be ill or unwell.