单项选择题

Many animals may be trained to do simple jobs if they know （）.

A．who their trainers are
B．they will be praised by their trainers
C．they will get a reward
D．something dangerous will happen to them

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单项选择题
Which hairstyle (发型) did the young man cut for Roger last time（）

A.A
B.B
C.C
D.D
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