单项选择题

A．Cries of birds are affected by seasons.
B．Only some sorts of birds can cry.
C．Birds would cry when they meet dangers.
D．It is easy to tell the singing of a bird from its crying.
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单项选择题
A．What subject Dr. Duncan teaches.B．If she resembles Dr. Duncan.C．What kind of teacher Dr. Duncan is.D．What kind of classes the man wants to take.
A．What subject Dr. Duncan teaches.
B．If she resembles Dr. Duncan.
C．What kind of teacher Dr. Duncan is.
D．What kind of classes the man wants to take.
填空题
performance
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