Band 7+: The diagram below shows the design of a modern for household waste.

The report adequately covers the main stages of the landfill design, but there's room for improvement in terms of detail and organization. To enhance the response, consider providing more specific details about each stage, such as the purpose of each component (e.g., why the clay layer is used, the function of the synthetic liner). Also, ensure a clear and logical flow by explicitly connecting the stages and using more precise language to describe the processes involved. For example, instead of just stating that waste is placed in the hole, elaborate on how the waste is managed and its effect on liquid production. Additionally, while the report mentions gas pipes, it could benefit from explaining their role in venting gases from the decomposing waste, as indicated in the diagram. The report falls short of the required 150 words.

The report is generally well-organized and easy to follow. The progression of stages is clear. However, the introduction mentions four stages while only three are explicitly described (Construction, Use, Closure). While the stages are implicitly there, explicitly stating them would improve coherence. Consider using more varied cohesive devices to enhance the flow between sentences and paragraphs.

The vocabulary is adequate and appropriate for the task. Terms like 'man-made hole,' 'drainage tank,' and 'synthetic liner' are used correctly. To improve, try incorporating a wider range of synonyms and more precise vocabulary related to environmental engineering or waste management. For example, instead of 'placed into the hole,' consider 'deposited into the landfill.'

The report demonstrates a good command of grammar with very few errors. The sentence structures are varied and generally accurate. To further enhance the grammatical range, consider using more complex sentence structures and varied verb tenses where appropriate to describe the processes more dynamically.