单项选择题
What is the difference between Act One and Act Two in the test（）
A．The shape of the cubes used. B．The size of the objects shown. C．The number of times of repeating the process. D．The weight of the boxes moving across the stage.
单项选择题 How do students view paper textbooks in this digital age（）
单项选择题 In what way are printed books frustrating to students（）
单项选择题 When is a scientific approach best embodied in a negotiation according to the man（）
