单项选择题The Shadow Cabinet is organized by _______________ in Britain.
单项选择题The well-known river that runs through London is called _______________.
单项选择题The Pilgrim's Progress was written by __________.
单项选择题The Ivy League, the group, of old private north-eastern universities, include ______________. and some others.
单项选择题Robert Burns was a _________ poet.