1.What is the author’s main purpose in the passage?
a. To propose a theory to explain sunspots
b. To describe the nature of sunspots
c. To compare the umbra and penumbra in sunspots
d. To argue for the existence of magnetic fields in sunspots
2.The word controversial in paragraph 1 is closet in meaning to
a.widely accepted
b.open to debate
c.just introduced
d.very complicated
3.Solar particles are hurled into space by
a.undetermined causes
b.disturbances of wind
c.small rivers on the surface of the sun
d.changes in the Earth’s atmosphere
4.The word particles in paragraph 1 refer to
a.gas explosions in the atmosphere
b.light rays from the sun
c.liquid streams on the sun
d.small pieces of matter from the sun
b.Very hot
c.Very bright
d.Very hard
6.What does the author mean by the statement Actually, the sunspots are cooler than the rest of the photosphere, which may account for their apparently darker color?
a.Neither sunspots nor the photosphere is hot.
b.Sunspots in the photosphere do not have any color.
c.The color of sunspots could be affected by their temperature.
d.The size of a sunspot affects its temperature.
7.The word they in the paragraph 3 refers to
a.structure
b.spots
c.miles
d.Granules
8.The word consequently in the paragraph 3 could best be replaced by
a.as a result
b.nevertheless
c.without doubt
d.in this way