Skip to content
Prep
Freely
Home
TOEFL
IELTS
Guides
Log in
Sign up
P
Account
Profile
My progress
Settings
Log out
TOEFL
/
Listening practice
/ Section 3LUN
Listen to an Academic Talk
Listen to part of a talk.
Listen
44. What is the talk mainly about?
A
How comparing tree-ring patterns helps establish their calendar dates.
B
Why counting rings provides no information about a tree.
C
Why every tree in a region has exactly the same number of rings.
D
How researchers make trees produce wider rings.