Which of the following is NOT a design feature of human language（）

单项选择题The Canterbury Tales, a collection of stories told by a group of pilgrims on their way to Canterbury, is an important poetic work by（）.

A. William Langland
B. Geoffrey Chaucer
C. William Shakespeare
D. Alfred Tennyson

单项选择题As there is less and less coal and oil, scientists are exploring new ways of making use of （）energy, such as sunlight, wind and water for power and fuel.

A. primary
B. alternative
C. instant
D. unique

单项选择题Some of you may have finished unit one.（）, you can go on to unit two.

A. If you may
B. If you do
C. If not
D. If so

单项选择题Children need friends（）their own age to play with.

A. of
B. for
C. in
D. at

单项选择题Who wrote The American7（）

A. Herman Melville
B. Nathaniel Hawthorne
C. Henry James
D. Theodore Dreiser