单项选择题All of the following words except ______ belong to the closed class.
单项选择题Henry David Thoreau was the author of the world-famous
单项选择题It was the expedition of ______ that led to Britain's claim to Australia.
单项选择题Which of the following words does not belong to the open class
单项选择题Friday is a famous fictional character in ______ 's novel Robinson Crusoe.
