кому-либо что-либо обеспечено(вариант требует замены конструкции: Greg may think he has a lock on the promotion, but I'm determined to prove him wrong.)
неплохо разбираться в(You have a pretty good handle on the topic. You've read some of the books, you've watched the movies. What are your feelings about what's happening to all these hikers and hunters? – Ты неплохо разбираешься в этой теме ART Vancouver)