单项选择题

The volume knob, if turned to ward the left, will（）the sound

A．magnify
B．enlarge
C．amplify
D．reinforce

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Tom could hardly（） his excitement as he knew that he had made a real discovery.

A. conceal
B. reveal
C. show
D. discover
单项选择题
The village lies over the mountains, and is（）only by boat

A．acceeded to
B．available
C．accessible
D．obtainable
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