| 1 | Can you smell a gas leak? | |
| 2 | The gas pipe has been blocked off to prevent escapes. | |
| 3 | Two other types of respirator systems solve the leak problem. | |
| 4 | On the way back home, we had a flat tire. | |
| 5 | The couple were suffocated by fumes from a faulty gas fire. |
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