单项选择题

The old people often raise______for the sake of companionship.

A．pets
B．pipes
C．pills
D．pies
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单项选择题
We live in a time______, more than ever before in history, people are moving.
A．what
B．when
C．which
D．where
单项选择题
______of the students in our class are from the north.
A．Two ninth
B．Second ninth
C．Second nines
D．Two ninths
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