Why are the archaeologists interested in dendrochronology
A. They can measure constructions.
B. It helps them study past society.
C. It provides a time tracing procedure.
D. They can build more buildings.
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According to the passage, we learn that the population of illiteracy in Africa is ______.
A. approximately six hundred million
B. approximately seven hundred and twenty-five million
C. approximately one hundred million
D. eighty to eighty-five million
A world plan mentioned in the passage aims at ______.
A. helping illiterates learn how to read and write
B. training responsible citizens
C. enforcing the functions of UNESCO
D. urging Southern European countries to take the lead in attacking illiteracy
What was the first part of Robinson Crusoe talking about
A. His lonely life.
B. His characters.
C. His journeys by sea.
D. His fame and wealth.
What do astronomers use photographic plate for
A. Decreasing the time it takes to photograph objects.
B. Avoiding using a telescope.
C. Sharpening the color of what they observe.
D. Obtaining images of distant objects.
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