Calling Customer Service Answering machine/ˈkʌstəmər/ AM：Thank you for c...

A Driver-lessCar M1：Hey, look at that. M2：Look at what? M1：Look out the ...

Continents Here are 6 of the Earth’s 7 continents./ˈkɒntɪnənts/大陆大洲 Asia...

Vocabulary : Things We Enjoy Doing This man goes running 5 days a week i...

Water On Earth Most of the Earth’s water is in the oceans. The two large...

Overview of Earth Earth is where we all live. It is our home in the sola...

Checking up on Ada How was Ada’s new job in Beijing? It seems to be goin...