B

1, A recent survey of teenagers in the USA had some surprising results.

2, The regular activity of the club is a 5 km walk to the beach on Sunday morning.

3, The aim of the program is to teach primary and secondary students about water safety.

4, I don’t have my table tennis with me.

5, Most of the world’s surface is water.

6, We can learn more about the undersea world thanks to this invention.

7, He could explore the oceans of the world and study underwater life.

8, Until recently, man could not stay underwater for long.

9, Would you like to come to my house to play table tennis?

10, I also have to finish this question for Math tomorrow.

Chúc bạn học tốt nhé!