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TOEFL
/
Listening practice
/ Section ET4Q
Listen to an Academic Talk
Listen to part of a talk in an archaeology class.
Listen
25. What is the talk mainly about?
A
Why tropical forests are difficult to study
B
How the growth rings of trees are used to date wood and study past climates
C
The techniques used to preserve wooden beams in old buildings
D
How trees respond to attacks by insects