It is known that China _____ the third world. [ ]

A. is belonging to

B. is belonged to

C. belonging to

D. belongs to

Multipurpose Internet Mail Extension (MIME) is a (2) document messaging standard in the Internet enviroment, with MIME, users can send (3) Email messages that include audio, video, graph-ices, and text to any other user of a TCP/IP network. Richtext information can also be (4) into messages. It defines the fonts, formats, and (5) features of a document so the document can be easily (6) on many different types of systems.

A) incorporated B) filled C) stored D) flied