（1）
Who was probably the first in the middle ages to encourage experimenting?
A . Galileo.B . Roger Bacon.C . Aristotle.
（2）
Where did Galileo carry out his experiment?
A . In France.B . In England.C . In Italy.
（3）
What is the main purpose of this talk?
A . To introduce the development of modern science.B . To show the importance of scientific experiment.C . To list the discoveries by some great scientists.
