单项选择题
A．About the 6th century. B．Before the 17th century. C．Before the 14th century. D．Before the 15th century.
A．There are many names all over the world. B．The names in different countries are different. C．Some names are very long, and some are very short. D．Some people have nicknames.
A．Chinese people find it very easy to learn the names of English people. B．English people find it very easy to learn the names of American people. C．Jenny finds it very easy to learn the names of students from all over the world. D．Any name is very difficult to learn.