.Because they think their English teacher is their good friend.David is also a good player.He thinks Yao Ming is one of the best basketball (42) Bin the world.So he wants to know (43) Aabout Yao Ming on the Internet.His great wish (44) Bto see Yao Ming,...
First, its development is based on the Internet. With a fast network and a smartphone, anyone who has passed the identity(身份) check can be an online teacher, and anyone with an online account can buy "pay-for-knowledge" products that he or she wants at an affordabl...