From the first paragraph we know that ______. On the whole, this passage is about ______.

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问题 From the first paragraph we know that ______.
On the whole, this passage is about ______.

选项 A、how to put up high antennas
B、a way of picking up better TV programs
C、how to use the empty channels on your TV set
D、the way that TV signals are sent

答案B

解析
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