单项选择题A.To introduce the woman to someone who has researched blushing.B.To illustrate the benefits of a public-speaking class.C.To give an example of someone who blushes easily.D.To example a way to overcome blushing.
单项选择题A.A place for making astronomical observations.B.An instrument used for observing stars.C.A trait of measurement.D.The North Star.