• Orca vs great white shark
Who is the real apex predator?
8767

› Essential Words
6576#10138

› Essential Words 2
••
6576#18046

› Listionary
6576#14187

• Occam's Razor
4386

• Odd Number
The Odd Number Rule
10066

Songs in Easy English

◌◌◌ offensive
11561

◌◌◌ opal
7181

○○○ oppose ⪢⪢
A new study shows more than 80 percent of Japanese _____ the country hosting the Olympic Games this year.
15401

• optical fiber
7050

• optical fiber cable
6554

◌◌◌ ordeal
#Espresso English
4344

◌◌◌ otter
-- fend, paydirt, whip, insulate, pantry, frigid
14594

• The Old Hound
#Essential Words
11994