单项选择题

The policeman put down the phone, _______ with a smile on his face.

A．satisfied
B．satisfying
C．to be satisfied
D．having satisfied
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单项选择题
A dolphin breathes through its （）.

A．mouth
B．ears
C．skin
D．blowhole
单项选择题
More than one man _______ been sent to the hardest place since 1979.
A．has
B．have
C．had
D．is
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