William Butler Yeats was a(n) （） poet and playwright.

单项选择题The distinctive features of a speech variety may be all the following EXCEPT （）.

A．lexical.
B．syntactic.
C．phonological.
D．psycholinguistic.

单项选择题Death of a Salesman was written by （）.

A．Arthur Miller.
B．Ernest Hemingway.
C．Ralph Ellison.
D．James Baldwin.