Test of English as a Foreign Language · iBT

TOEFL iBT Practice

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0–120

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4

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3hrs

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ReadingItem 1 of 4
Photosynthesis is the process by which green plants and certain other organisms transform light energy into chemical energy. During this process, chlorophyll in the plant's chloroplasts absorbs sunlight, using it to combine carbon dioxide from the air with water from the soil. The result is glucose, a simple sugar that the plant uses for energy, and oxygen, which is released as a by-product. Because photosynthesis produces the oxygen in our atmosphere, it is fundamental to life on Earth.

According to the passage, what does chlorophyll do?

The word 'it' in the passage ('using it to combine') refers to:

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