单项选择题

A．what
B．why
C．how
D．which
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单项选择题
What is the main idea of the passage
A．Educational changes in Canadian society.
B．Canada during the Second World War.
C．Standards of living in Canada.
D．Population trends in postwar Canada.
单项选择题
A．heardB．to be heardC．hearingD．having head
A．heard
B．to be heard
C．hearing
D．having head
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