单项选择题Mr. Simpson stopped at the pedestrian crossing because
单项选择题Which of the following is CORRECT about the accident
单项选择题According to Howard Catton, why do more nurses tend to work in Australia
单项选择题What is the main idea of the news item
单项选择题The American government is divided into three branches: the legislative, the executive and the judicial. They are represented by ______, ______, and ______ respectively.