| 1 | You should let him know of this matter. | |
| 2 | It's stuffy in here, I can't take it. | |
| 3 | People with stuffy or blocked noses often snore. | |
| 4 | They altered the house to improve its ventilation. | |
| 5 | The natural gas pipeline linking the two countries realized one-way ventilation at the end of last year. |