2026年3月托福机经套卷(第4套)Listen to an Academic Talk / 24 道题

Listen to an Academic Talk / 2

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What is the main topic of the talk?

AAdvantages and disadvantages of indigo for coloring jeans

BThe role of indigo in British trade and colonial expansion

CThe history of the indigo trade and indigo's reappearance as a modern commodity

DQualities that make indigo a viable commercial product

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正确答案：C

What factor contributed most to the decline of natural indigo in industrial use?

AThe effects of climate change on Indigofera plants

BLabor shortages in the British Empire

CThe invention of synthetic indigo

DTrade restrictions

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正确答案：C

What explains the appeal of natural indigo in today's market?

AIt is seen as good for the environment.

BIt is the least expensive dye available.

CIt requires very little processing.

DIt is used in traditional rituals.

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正确答案：A

Why does the speaker discuss the labor involved in traditional indigo dye extraction?

ATo explain why indigo processing can be interesting for tourists

BTo support the claim that indigo is good for traditional economies

CTo challenge the claim that some producers use harsh chemicals

DTo introduce one problem with using natural indigo

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正确答案：D