TOEFL Speaking Task 4 Sample: Using points and examples from the lecture, explain two effects of the discovery of synthetic dye.

1.Sub Scores

• Delivery: 3

• Language Use: 3

• Topic Development: 3

2.Estimated Scores

• Total Score: 23

3.Delivery The speaker's delivery is generally clear and fluid, but there are occasional pauses and some minor pronunciation issues. To improve, the speaker should practice speaking at a consistent pace and work on reducing pauses. Additionally, focusing on accurate pronunciation will help eliminate any spelling errors that may arise from mispronunciation.

4.Topic Development The response is coherent and well-organized, with clear connections between ideas and sufficient support or examples from the lecture. However, there is room for improvement in providing more detailed explanations of the examples given. To enhance topic development, the speaker should expand upon the examples provided and ensure that they are clearly connected to the main points being discussed.

5.Language Use

The professor illustrates two effects of the discovery of synthetic dye. The first is about fashion change. People currently can wear colorful fantasy clothing ("fantasy" is not the appropriate word here, use "clothing" instead) because it's cheaper. For example, only wealthy people at that time can wear purple attire because the purple dye can only be produced by the liquid secreted from the snails, which is costly to collect. However, with the invention of synthetic dye, now the purple clothes is are (use "are" for plural nouns like "clothes") available to everyone. Besides, the invention of synthetic dye caused greater advancement in medicine. For example, the substance in the yellow dye showed that this can kill the germs and bacterias bacteria ("bacteria" is already plural; "bacterias" is incorrect) on its equipment, which can also be used to clean cars and woods cuts and wounds (replace "cars and woods" with "cuts and wounds" to match the lecture content) and prevent infection.

Revised Answer (140 words):

The professor discusses two significant effects of synthetic dye discovery. Firstly, it led to a change in fashion trends as people could now afford colorful clothing due to its lower cost. For instance, only wealthy individuals could wear purple garments in the past, as the dye was made from a costly liquid extracted from snails. However, synthetic dyes made purple clothing accessible to everyone. Secondly, the invention of synthetic dyes contributed to advancements in medicine. For example, researchers discovered that a substance in yellow dye could kill germs and bacteria on laboratory equipment. This finding led to the realization that the dye could be used for sterilizing and cleaning cuts and wounds, helping prevent infections.

6.Mind Map

• Synthetic dye discovery
  • Fashion change
    • Affordable colorful clothing
    • Purple clothing example
  • Advancements in medicine
    • Substance in yellow dye
    • Sterilizing and cleaning cuts and wounds

7.Key Words