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Some decades ago, watching TV depended on different factors, including the weather.
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In the 1970s, it was only possible to watch local TV programs.
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A little is considered a correct alternative for "a few" in "a few channels" (lines 7 and 8).
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"most of them" (lines 2 and 3) and the majority of them are synonymous expressions.
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Smart TVs have been popular for many decades.
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Without a wireless adapter, it is not possible to connect a Smart TV to the Internet.
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The variety of TV programs was much greater after the 1970s.
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"Although" in "Although they differ" (line 2) can be correctly replaced by though.
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"bad" in "reception was sometimes bad" (line 9) is not the contrary of better.
