The function of e-commerce is more than just buying and selling goods and services on the Internet.
A．电子商务的功能很多，如提供网上货物交易的服务。
B．电子商务更多的功能在于做买卖并提供网络服务。
C．电子商务的功能不只是在互联网上买卖货物和服务。
D．电子商务的功能更多的是从互联网上购买货物和服务。

A. are operated by the disabled
B. offer free food to volunteers
C. sell home-made goods
D. are open day and night

A. included in a word list
B. pronounced correctly
C. explained in English
D. used in a context