Lesson Five: Thanks for Your Work
| Main Words | Similar Words |
| Appropriate | Suitable, proper, correct, right |
| Collect | Gather, save, accumulate |
| Rubbish | Garbage, waste, junk |
| Area | Region, part, zone, space |
| Street | Road, way, path, lane |
| Put | Set, place, situate |
| Bin | Basket, container, holder, box, case |
| Leave | Departure, exit, drive away |
| Dirty | Dull, unclean, filthy |
| Smell | Aroma, scene, perfume |
| Believe | Trust, consider, faith |
| Important | Significant, vital, essential, main |
| Clean | Fresh, hygienic, unpolluted |
| Trouble | Distress, annoyed, woe, anxiety, worry |
| Pile | Heap, quantity, mound, bundle |
| Unhygienic | Unhealthy, unclean, polluted, dirty |
| Realize | Understand, recognize, think, appreciate |
| Dustbin | Wastebasket, bin, litterbin |
