单项选择题

Mrs. Black has a ______ dog.

A． ten years old
B． ten-year-old
C． ten year old
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单项选择题
______ you or he can do it, then please choose another task(任务).
A． Neither
B． either
C． Both
单项选择题
Mother kept telling my little brother to study hard, but ______ didn't work.
A． that
B． it
C． which
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