Band 7+: do you think that within the next 100 years we will be trying to build new cities on other planets

Your pronunciation is above average. However, you may find complexity in certain words challenging. Regular practice should aid in improvement.

The answer is relevant to the question and provides a reasonable prediction. Consider expanding on the scientific and technological advancements that would make such a project feasible, and perhaps explore some of the challenges involved in building and sustaining extraterrestrial cities. A more nuanced discussion of the factors contributing to overpopulation would also strengthen the response.

The answer is coherent and well-structured. The ideas flow logically. Minor repetition ('more and more') could be avoided for improved fluency. A more definitive answer (rather than 'maybe yes') would enhance the response.

Vocabulary is adequate and mostly accurate. Words like 'overcrowded' are used appropriately. More sophisticated vocabulary could be incorporated to demonstrate a wider range, for example, instead of 'increased' you could use 'prolonged' or 'extended' in relation to life expectancy. The phrase 'let people have a place to live' could be replaced with something more concise and sophisticated, such as 'provide additional habitable space'.

Grammar is mostly accurate, with only minor errors. Sentence structures are simple but effective. Using more complex sentence structures (e.g., subordinate clauses) would improve grammatical range. For example, instead of two separate sentences, 'The planet may be overcrowded more and more. And we need to build a new city...', a more sophisticated sentence could be constructed such as 'With the planet becoming increasingly overcrowded, the need to build new cities on other planets will become apparent'.