在应试型(雅思 或新托福 等)议论文写作中，通常遵循introduction- body-conclusion(引言段-主体段-结论段)的“三步曲”。Body(主体)段落提供了论证观点的理由，是整个文章的主体，在评分中占有很大的比重。例如一篇满分的雅思 作文(9分)必须“presents a fully developed position in answer to the question with relevant, fully extended and well supported ideas”。这里的“fully extended / well supported”，必须通过主体段来体现。
1.Write a topic sentence for each paragraph you plan to write. Each topic sentence should relate to your thesis statement and introduce what the paragraph will be about. If you find that the topics you want to discuss do not support the thesis statement you have written, revise your thesis statement or reconsider your topic sentenc
