单项选择题

A．Using computers is a waste of resource.
B．Many people don’’t turn off the computers after using them.
C．Computers are run by electricity.
D．A computer is not a must for working.
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单项选择题
A．Why her parents wanted to go to Gettysburg.B．Why her family’’s vacation plans changed ten years ago.C．Where her family went for a vacation ten years ago.D．When her family went on their last vacation.
A．Why her parents wanted to go to Gettysburg.
B．Why her family’’s vacation plans changed ten years ago.
C．Where her family went for a vacation ten years ago.
D．When her family went on their last vacation.
单项选择题
A．They are less likely to run away.B．It’’s easier for their masters to train them.C．They are less likely to be shy with human beings.D．It’’s easier for them to form a relationship with their masters.
A．They are less likely to run away.
B．It’’s easier for their masters to train them.
C．They are less likely to be shy with human beings.
D．It’’s easier for them to form a relationship with their masters.
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