单项选择题

A．animals can look after them in hospital and home
B．animals can be their good companions
C．are more reliable than people
D．can help them establish more social contacts
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单项选择题
A．a zoo with various animalsB．a market selling various animalsC．an organization for the protection of animalsD．an organization for the protection of children
A．a zoo with various animals
B．a market selling various animals
C．an organization for the protection of animals
D．an organization for the protection of children
单项选择题
A．changed market demandB．changed OPEC policyC．security situation in Saudi ArabiaD．U.S. policy toward Saudi Arabia
A．changed market demand
B．changed OPEC policy
C．security situation in Saudi Arabia
D．U.S. policy toward Saudi Arabia
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