单项选择题

According to the passage, which of the following was wind energy first used for

A．Pumping water.
B．Electricity.
C．Propelling ships.
D．Grinding grain.
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单项选择题
Children in hospital usually turn to ______ in order to catch up with their school work.
A．hospital teachers
B．schoolmates
C．parents
D．school-teachers
单项选择题
We can conclude from the passage that the author is ______.
A．unfavorable towards children receiving education in hospitals
B．in favor of the present state of teaching in hospitals
C．unsatisfied with the present state of hospital teaching
D．satisfied with the results of the latest survey
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