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三、克漏字測驗【請依照段落上下文意，選出最適當的答案】
     The sun is a huge, fiery globe of gas. Every now and then, it sends out massive waves of charged particles that      16       speeds upwards of a million kilometers an hour. These charged particles interact with our magneticnorthern and southern poles,    17    a breathtaking light show that enthralls all its viewers.
     These light shows are known as auroras. Since Earth’s magnetic field is strongest at its poles, auroras appearmost brightly near the North and South Pole. They are not    18    because they occur at any time of the year.Auroras appear as slowly moving curtains, bands, spots of color, and a variety of other shapes that shift across the sky.They can also exhibit more than one color at a time. The colors, ranging from purple to green,   19    on thealtitude of oxygen and nitrogen penetrated by solar energy. The most common color on view is green because it is atlower altitudes and people can see green the easiest. Photographing the breathtaking auroras is not difficult, butphotos don’t do them   20    . Viewing auroras is something that needs to be experienced in person.
16.
(A) at
(B) by
(C) in
(D) from

參考答案

答案：A
難度：困難0.28
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