| 1 | Asphalt is used for making road surfaces. | |
| 2 | These comprise asphalt, tar and waxes. | |
| 3 | The workers mixed the asphalt with sand and gravel together. | |
| 4 | China is one of the major importers of the natural pitch. | |
| 5 | In fact, it is the Persian word for pitch. |
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