| 1 | It happened/chanced that I was busy writing a letter when he came. | |
| 2 | You and your friend come right in and join me for lunch! | |
| 3 | I was just passing, so I thought I'd blow in for a few minutes. | |
| 4 | Sorry, I didn't mean to dial your number. I just sat on my phone. | |
| 5 | Later, I told my friend Y about it. He also worked as a department manager. |