单项选择题

A．Their flying ability improved greatly.
B．They became warm-blooded.
C．They began to lay eggs.
D．They changed their migration patterns.
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单项选择题
A．She loved the people in Africa.B．She loved the tour in some places.C．Three weeks is just like a few minutes.D．The whole tour is quite interesting.
A．She loved the people in Africa.
B．She loved the tour in some places.
C．Three weeks is just like a few minutes.
D．The whole tour is quite interesting.
单项选择题
A．They can do better than others.B．It is expensive to hire labour.C．They don’t like to be helped.D．They don’t trust others.
A．They can do better than others.
B．It is expensive to hire labour.
C．They don’t like to be helped.
D．They don’t trust others.
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