We all know that DNA has the ability to identify individuals but, because it is inherited, there are also regions of the DNA strand which can relate an individual to his or her family (immediate and extended), tribal group and even an entire population. Molecular Genealogy (宗谱学) can use this unique identification provided by the genetic markers to link people together into family trees. Pedigrees (家谱) based on such genetic markers can mean a breakthrough for family trees where information is incomplete or missing due to adoption, illegitimacy or lack of records. There are many communities and populations which have lost precious records due to tragic events such as the fire in the Irish courts during Civil War in 1921 or American slaves for whom many records were never kept in the first place.
The main objective of the Molecular Genealogy Research Group is to build a database containing over 100,000 DNA samples from individuals all over the world. These individuals will have provided a pedigree chart of at least four generations and a small blood sample. Once the database has enough samples to represent the world genetic make-up, it will eventually help in solving many issues regarding genealogies that could not be done by relying only on traditional written records. Theoretically, any individual will someday be able to trace his or her family origins through this database.
In the meantime, as the database is being created, molecular genealogy can already verify possible or suspected relationships between individuals. “For example, if two men sharing the same last name believe that they are related, but no written record proves this relationship, we can verify this possibility by collecting a sample of DNA from both and looking for common markers (in this case we can look primarily at the Y chromosome(染色体)),” explains Ugo A．Perego, a member of the BYU Molecular Genealogy research team.．
Which of the following CANNOT be inferred from the passage

A．the auctioneer knocks on the table
B．the auctionees names the highest bidder as the buyer of the goods
C．the goods are knocked down onto the table
D．the auctioneer bangs the table with a hammer

According to the record in the inscriptions(题字，碑铭), ancient China Post originated in the Yin-Shang Dynasty, prosperous (繁荣)in the Zhou Dynasty, popular in the Spring-Autumn and the Warring States Periods (770-221 B. C). Confucius said, "The propagation (传播) of moral is as rapid as post delivery", which described the popularity of the post.
Paragraph Two:Ancient Chinese post system was the special communication organization for govern ment, which only delivered official documents and not private letters. Public communication which was organized by individuals developed slowly. By the coddle stage of Ming Dynasty, with the progress of productive forces and the increase of the requirements for public communication, private-owned post offices were created. By late Qing, the number of private owned post offices had exceeded several thousands, forming their own communication network, which became the public communication organization in parallel with official posts.
Paragraph Three:
The spread of modem post to China appeared in the form of so called "Guest Post", which was the post organization set up by western powers which violated (侵犯) Chinese sovereignty (主权). The invasion of "Guest Post" to China originated from the trading of western merchants in China after the discovery of shipping line on seas.
Paragraph Four:After the founding of the People’s Republic of China in 1949, China Post entered a new development period. China Post was created on the basis of the post in the liberated area and the Chinese Postal Administration which had been taken over and transformed. After the Ministry of Posts and Telecommunications was founded, it undertook to establish new management system, restore and develop postal network, unify the service categories and the standards of postage, pose the service principle as Speed, Accuracy, Security and Convenience, and establish and perfect the business management system. By doing so, the postal cause in China gained an initial development.
Paragraph Five:
In the early 1960s, with the vigorous upsurge (高潮、上升) of the national independence movement in Africa, China established direct postal relations with many newly independent African countries. By the end of 1965, 77 countries and regions in all the continents of the world had established the direct postal relations with China, which was a two time increase compared to that of 26 in 1949. African countries increased from 2 to 18.
Now match each paragraph to the appropriate title.
Note: there are two extra titles.
Titles

• [A] The Relationship between China Post and Overseas post office
• [B] Origin and Characteristics of Post
• [C] Modification and Reorganization of Post
• [D] The Development of the Ancient Public Communication
  
• [E] Appearance of Special Public Communication
  
• [F] Invasion of "Guest Post"
  
• [G] Establishment and initial Development of Post in P.R. China