单项选择题
The Yellow Pages is a classified commercial ______ that lists subscribers according to their trade or business.
单项选择题 ______was the most popular American poet of this century. At the age of 87, he was invited to read a poem at the inauguration of President Kennedy.
单项选择题 H. G. Wells is one of the most famous writers of fiction.
单项选择题 A word is a symbol that______.
