单项选择题

教材编写原则包括趣味性原则、灵活性和开放性原则、发展性和拓展性原则、科学性原则以及______。

A．实际性原则
B．能效性原则
C．有效性原则
D．思想性原则
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单项选择题
It is the autor’s ______ that leads him into Chatroulett.
A．curiosity
B．unwillingness
C．enthusiasm
D．ignorance
单项选择题
Mother took her son to the concert so that the boy could ______.
A．be encouraged to be a brave man
B．become a piano master
C．be inspired for what he’d achieved
D．be a great pianist
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