The Grand Canyon, carved by the Colorado river, in northwestern ______ is one of nature's most impressive sights.

单项选择题The following words, EXCEPT, form a minimal set and three minimal pairs, ______.

单项选择题The 18th century Witnessed a new literary form--the modem English novel, which is contrary to the medieval romance, gives a ______ presentation of life of the common people.

单项选择题Whitman's poems are characterized by all the following features EXCEPT ______.