单项选择题

A．They were imported from European countries.
B．They migrated from distant colonies.
C．They were domesticated from local wild breeds.
D．They were the result of a careful breeding program.
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单项选择题
A．She has never been to Gettysburg.B．She took a political science course.C．Her family still goes on vacation together.D．She’’s interested in the United States Civil War.
A．She has never been to Gettysburg.
B．She took a political science course.
C．Her family still goes on vacation together.
D．She’’s interested in the United States Civil War.
单项选择题
A．Because it happens very fast.B．Because it gives eyes a break.C．Because it moistens eyes.D．Because it relaxes eyes.
A．Because it happens very fast.
B．Because it gives eyes a break.
C．Because it moistens eyes.
D．Because it relaxes eyes.
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