单项选择题

A．The first period of cold, wintry days in autumn.
B．The turning of color and falling of leaves.
C．A large mass of warm tropical air carried northward.
D．The southwestern winds.
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单项选择题
A．To welcome the tourists.B．To make money.C．To keep the tourists away.D．To warn the tourists not to ruin the garden.
A．To welcome the tourists.
B．To make money.
C．To keep the tourists away.
D．To warn the tourists not to ruin the garden.
单项选择题
A．He gets ill at the same time every year.B．He doesn’’t get enough exercise.C．He often has difficulty sleeping.D．He’’s sick with influenza throughout the winter.
A．He gets ill at the same time every year.
B．He doesn’’t get enough exercise.
C．He often has difficulty sleeping.
D．He’’s sick with influenza throughout the winter.
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