单项选择题
To help students understand how we see, teachers often draw an （）between an eye and a camera.
A．image B．analogy C．imitation D．axis
单项选择题 His use of color, light and form quickly departed from the conventional style of his （）as he developed his own technique.
单项选择题 It is hard to tell whether we are going to have a boom in the economy or a （）
单项选择题 The （）from childhood to adulthood is always a critical time for everybody.
