单项选择题

A．By plane.
B．By car.
C．By train.
D．By bus.
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单项选择题
A．It focuses automatically.B．It has a lot of specialized lenses.C．It is easy to load.D．It advances the film automatically.
A．It focuses automatically.
B．It has a lot of specialized lenses.
C．It is easy to load.
D．It advances the film automatically.
问答题
S3. How many different kinds of sounds are mentioned in Paragraph 3
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