单项选择题In English Civil War, also called the Puritan Revolution, a famous general _____ defeated the king at Naseby in 1645.
单项选择题In the United Kingdom, police officers are not allowed to join _________ or to go on strike.
单项选择题The direct reason for specialization is ______.
单项选择题The author writes the development of geology to demonstrate ______.
单项选择题We can infer from the passage that ______.