单项选择题
27. Overall there are more speakers of Chinese than of ___________
28. The boundaries of a speech community may be different from ___________ .
29. People who live in different places may belong to ___________ .
30. Many people learn English as ___________ .
A、a second language
B、 the same language
C、 the same speech community
D、 any other language
E、 national boundaries
F、 a part of one’s heritage