单项选择题

A．Because they did not eat other animals.
B．Because they were useful for protections.
C．Because they always obeyed their masters.
D．Because they were good hunters.
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单项选择题
A．It’s hard to know what to believe about it.B．He doesn’t believe it’s hard for everybody.C．It’s even harder than people say.D．It’s not as hard as he’d thought.
A．It’s hard to know what to believe about it.
B．He doesn’t believe it’s hard for everybody.
C．It’s even harder than people say.
D．It’s not as hard as he’d thought.
单项选择题
A．Horsemen.B．Brass doors.C．Drops of water.D．Metal balls.
A．Horsemen.
B．Brass doors.
C．Drops of water.
D．Metal balls.
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