单项选择题

A．The population of elderly people.
B．Nuclear weapon.
C．Violence in crime.
D．Living standards.
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单项选择题
Lance Bass wasn’’t able to go on a tour of space because of health problems.
A．Y
B．N
C．NG
单项选择题
A．Family phone numbers.B．Government service phone numbers.C．Business phone numbers.D．Professional services phone numbers.
A．Family phone numbers.
B．Government service phone numbers.
C．Business phone numbers.
D．Professional services phone numbers.
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