He's very ...... environmental issues.
Understand the Problem
The question is asking to fill in the blank with the correct preposition that fits the sentence. Specifically, it focuses on grammatical correctness in English concerning the phrase 'He's very ...... environmental issues.'
Answer
interested in
The final answer is interested in.
Answer for screen readers
The final answer is interested in.
More Information
The correct phrase is 'interested in' which is used to express curiosity or concern about a topic.
Tips
A common mistake is to use 'interesting by' or 'interested by', which are not standard English phrases.
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