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 PVNL
Listen to an Academic Talk
Listen to a talk in an engineering class.
Listen
40. What is the talk mainly about?
A
How the Pantheon was designed
B
Why Roman concrete has lasted so long
C
How modern concrete is made
D
Why volcanic ash is dangerous