What is the best invention of last 100 years; the computer, antibiotics, airplane, and explain why?
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Sample Response
Science and technology have advanced greatlymany folds in the last 100 years. It has progressed human lives in all spheres. Among all the inventions, the most revolutionarythe most revolutionary one is the inventionadvent of computers. In fact, computersComputers have become indispensable for communication, education, banking, travelling, health care, the aviation industryaviation industry, and virtually every other industryany other industry one can think of.
Why this response received Band 5.5
The response states a clear choice and briefly indicates the computer's broad usefulness, so its central position is easy to identify. However, at only 56 words, it is drastically underdeveloped and offers a list of applications rather than explaining why computers are the best invention; the priority is to build a full essay with developed reasons, specific examples, and a supported conclusion.
IELTS Writing Criteria Scores
Task Response
A clear preference for computers is stated, but the answer is extremely short and its sole supporting idea is only listed rather than developed.
Explain two distinct reasons for the choice in full body paragraphs and support each with a specific example.
Coherence and Cohesion
The four sentences follow a logical movement from background to position and support, although the response is too brief to demonstrate sustained progression or paragraphing.
Organise a complete response into an introduction, clearly focused body paragraphs, and a conclusion linked by purposeful transitions.
Lexical Resource
Vocabulary is reasonably varied and includes relevant terms such as "revolutionary" and "indispensable," but several collocations are awkward.
Use natural combinations such as "advanced many times over," "improved human life," and "the aviation industry."
Grammatical Range and Accuracy
Most sentence structures are controlled and meaning remains clear, though reference, capitalisation, and article use contain errors.
Check pronoun reference and articles carefully, and avoid unnecessary capitalisation of common nouns such as "computers."