全部本国生产粮食并尽量少进口

The response favours domestic production and presents relevant food-security, employment and quality arguments. However, “many kinds of food” leaves the extent of agreement less precise than the proposal, and several causal links and generalisations need fuller explanation.

Ideas follow a recognisable sequence, marked by “Firstly”, “Secondly”, “Finally” and “In conclusion”. However, the entire response is presented as one paragraph, so the three reasons and conclusion need separate paragraphs to make the organisation visible.

The response uses a sufficient range of topic-appropriate vocabulary such as 'food sufficiency', 'domestic production' and 'self-sufficient', with some less natural collocations like 'more food crisis' and 'food adequacy'.

A variety of sentence structures, including complex conditionals and relative clauses, is used with generally good control, despite recurring minor errors such as 'depends' and article omissions that do not impede meaning.

The response addresses the question directly with a clear position that food self-sufficiency is not always advisable, and main ideas are developed with relevant examples, though some supporting points could be extended further.

Ideas follow a recognisable introduction, economic argument, qualification and conclusion, supported by explicit linking phrases. However, the entire response is one paragraph, so these stages need clearer visual separation and some references remain vague.

Vocabulary is varied and relevant to trade and economic development, including “industrial innovation” and “geographical features”. However, expressions such as “self-reliant on food”, “productions” and “the mass people’s” reduce collocational precision.

The response uses a range of complex structures with generally good control. Errors in comparative formation, conditional consistency, clause construction and countability sometimes reduce accuracy without obscuring the main argument.

The response maintains a clear disagreement and acknowledges possible benefits before explaining geographical constraints. The Greenland example provides a causal illustration, but the long country list and absolute cost claims need more selective, qualified support.

Ideas progress logically across clear paragraphs with effective use of cohesive devices such as 'Certainly', 'However' and 'In addition to that', with only occasional slight overuse.

Vocabulary is sufficiently flexible for the topic, including items like 'arable land', 'self-sufficient' and 'domestic productivity', with a few non-idiomatic collocations such as 'In this picture' and 'yield enough food'.

A good range of structures is used, including subordinate clauses and relative clauses, with generally clear meaning. Minor problems with count nouns, determiners and noun-phrase construction appear in “weather condition”, “good intention” and “put restriction on”.

The response maintains clear agreement and gives relevant reasons concerning jobs, food quality, profits and emissions. However, it does not explicitly defend aiming to produce all food, and several claims need fuller support or qualification.

Paragraphing is logical and progression is clear with effective sequencing devices, although some linking and internal cohesion is at times mechanical.

The response shows a sufficient range of topic-appropriate vocabulary used with reasonable precision, including terms like unemployment rates, carbon emissions, and food processing plants, with only minor awkwardness.

A range of complex sentences is generally well controlled, including conditional, relative and causal clauses. The main weaknesses are occasional heavy phrasing and an unnecessary comma before the final purpose clause in the food-quality sentence.

The response addresses all parts of the question, presents a clear and consistent position, and develops main ideas with relevant explanation and an example, though the first body paragraph's alignment with the writer's stance is not fully clarified.

Ideas follow a clear concession-to-objection structure, supported by Although in the introduction and However in the second body paragraph. Explicitly framing the first body paragraph as an acknowledged advantage would make that structure easier to follow.

A good range of topic-related vocabulary includes arable land, biodiversity and culinary experiences. Some choices are less precise or natural, particularly utilising local food production and practices according to a country’s regional climates.

A variety of complex structures is used with flexibility and generally good control, with only minor errors that do not impede communication.

The position is clear throughout and the main ideas about feasibility and consumer benefit are relevantly developed with an example, though the competition point remains thinly supported.

Progression is generally logical with appropriate cohesive devices, but paragraph boundaries do not always match idea units, with one merit introduced mid-paragraph.

Vocabulary is varied and generally effective, including terms such as famine and indigenous. There are occasional awkward or imprecise expressions, notably undergoing destitution and the use of provide food where domestic production is intended.

A range of complex structures is used with generally good control, including relative clauses and coordinated clauses. Occasional errors do not prevent understanding, but in our tonight’s dinner tables has an incorrect preposition and conflicting determiners.

The position is clear and both the economic concession and harvest-risk argument are relevant. However, the US example does not establish the value of complete self-sufficiency, and the conclusion could explain more clearly why diversified supplies outweigh import savings.

Ideas progress logically across paragraphs with effective use of cohesive devices such as 'firstly', 'on the other hand', and clear referencing, sustaining a coherent line of argument.

There is a good range of topic-appropriate vocabulary, including items like 'self-sufficient', 'trade balance', 'fluctuating weather patterns', with generally precise usage and only occasional awkwardness such as 'food self-production'.

A variety of complex structures, including conditionals, concessive clauses, and subordination, is used with flexibility, and errors are occasional and do not impede understanding.

The response directly answers the question with a clear, consistent position, fully developed main ideas on economic efficiency, environmental sustainability, food security, and consumer welfare, supported by relevant examples.

Ideas are logically organised across clear paragraphs with effective sequencing, though cohesion relies somewhat predictably on connectors such as moreover, therefore, and consequently.

Vocabulary is wide, precise, and naturally used for the topic, including terms like comparative advantage, overexploitation, and self-sufficiency, with only rare inaccuracy.

A wide range of complex structures, including conditionals and relative clauses, is used with flexibility and consistent accuracy throughout the response.