根据首字母或提示写出单词的适当形式。
(1)It’s a p        of the Great Wall.
(2)How b      is Beijing? It’s got about twenty million people.
(3)The Great Wall is m      than twenty thousand _________(千米) long.
(4)Where is New York?  It’s in the e        .
(5)Tell me m      about China.