题目内容：
第(50)题
A．Mr Stead said they were only doing what comes naturally. B．We asked her what we were supposed to do, shoot the birds, or chop the trees down?
C．They have heard every kind of complaint.
D．One man rang to say he was kept awake by the splashing of a fountain in the garden next door.
E．The council will ask the farmer to move it.
F．Farm machinery is a common cause.
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答案解析：