Complete these phrases with the correct preposition: fond, keen, aware, concentrate, refer, complain, interested.

Sure! I will be happy to help you with completing these phrases with the correct prepositions. Here are the phrases with the missing prepositions and their respective solutions:

1. fond _____ - The correct preposition is "of". We use "fond of" to express a strong liking or affection for someone or something. Example: "I am fond of chocolate."

2. keen _____ - The correct preposition is "on". We use "keen on" to express a strong interest or enthusiasm for something. Example: "She is keen on playing tennis."

3. aware _____ - The correct preposition is "of". We use "aware of" to describe being conscious or informed about something. Example: "He is aware of the potential dangers."

4. concentrate _____ - The correct preposition is "on". We use "concentrate on" to describe focusing or giving full attention to something. Example: "Please concentrate on your studies."

5. refer _____ - The correct preposition is "to". We use "refer to" to indicate mentioning or directing someone to a particular thing or person. Example: "The doctor will refer you to a specialist."

6. complain _____ - The correct preposition is "about". We use "complain about" to express dissatisfaction or disapproval of something. Example: "She likes to complain about the weather."

7. interested _____ - The correct preposition is "in". We use "interested in" to describe being curious or attracted to something. Example: "He is interested in learning a new language."

Remember to always use these prepositions accordingly to ensure the correct meaning of the phrases. Let me know if you have any further questions or need additional clarification!