单项选择题

A．Only one.
B．Two.
C．Three.
D．More than three.
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单项选择题
A．It’’s difficult to find birds for recording.B．It’’s difficult to find quiet areas for recording.C．It’’s difficult to find animals for recording.D．It’’s difficult to find mammals for recording.
A．It’’s difficult to find birds for recording.
B．It’’s difficult to find quiet areas for recording.
C．It’’s difficult to find animals for recording.
D．It’’s difficult to find mammals for recording.
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psychologist
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