The largest city in Australia is _____.

单项选择题Romanticism as a literary movement came into being in England early in the latter half the _____ century.

单项选择题On which day is Halloween celebrated

单项选择题It is implied in the passage that _____.

单项选择题Which of the following statements about human alveolar macrophage is TRUE

单项选择题This passage is mainly about _____.