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 59A5
Listen to an Academic Talk
Listen to a talk in a chemistry class.
Listen
25. What is the main purpose of the talk?
A
To compare onions with other vegetables
B
To explain why cutting onions causes tears
C
To explain how tears protect the eyes from dust
D
To describe how onions are grown