单项选择题

A．Because they did not eat other animals.
B．Because they were useful for protection.
C．Because they were good hunters.
D．Because they always obeyed their masters.
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单项选择题
A．No, all the rooms are taken.B．Yes, there is a double room.C．Yes, there are some spare rooms.D．Yes, there is a single room.
A．No, all the rooms are taken.
B．Yes, there is a double room.
C．Yes, there are some spare rooms.
D．Yes, there is a single room.
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