Challenge #021 - In & On V

Challenge #021 Many of our students are great at English. I'm talking high-level. Able to express themselves clearly and accurately. Then...all of a sudden, they make a ridiculous mistake. "I went there on January" or "I saw him in Monday" Mistakes that are tiny, but make you go... Yes ladies and gentlemen, I'm talking about in and on. The smallest prepositions that make the biggest difference. Take 2 minutes to do this week's challenge: In & On V. Because when you use the wrong one it just...