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TOEFL
Change examRead an Academic Passage designed to build passage comprehension, evidence use, and efficient reading decisions.

What you will practice
Topic: Biology · Read an Academic Passage
Passage preview
A dense line of ants can move in opposite directions along the same narrow trail without the persistent traffic jams common on human roads. This does not mean that ants use a central planner. Instead, each worker responds to local cues, including chemical…
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