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1.We can learn from che first paragraph that_____________.
A. there are no volcanic activities on hoc spots
B. most hoc spots are located in the inner part of a plate
C. hot spots usually lie. at che boundaries of drifting plates;
D. the passage of plates through hot spots will leave dead volcanoes
2.The author believes that_____________.
A) the motion of the plates corresponds to thar of the earth's interior
B) the geological theory about drifting plates has been proved to be true
C) the hot spots and the plates move slowly in opposite directions
D) the movement of hot spots proves the continents are moving apart
3.That Africa and South America were once joined can be deduced from the fact that_________.
A) the two continents are still moving in opposite directions
B) they have been found to share certain geological features
C) the African plate has been stable for 30 million years
D) over 100 hot spots are scattered all around the globe
4.The hot spot theory may prove useful in explaining__________.
A) the structure of the African plates.
B) the revival of dead volcanoes.
C) the mobility of the continents.
D) the formation of new oceans.
5.The passage is mainly about______________.
A) the features of volcanic activities
B) the importance of the theory about drifting plates
C) the significance of hot spots in geophysical studies
D) the process of the formation of volcanoes
