单项选择题According to the passage, China set a good example in ______.
单项选择题The author is primarily concerned with Duncan's ______.
单项选择题On Page 357 are presented details about ______.
单项选择题On which page can the reader find explanations on the Jamaican variety of English
单项选择题According to the passage, a sunscreen can be described as all the following EXCEPT______.