[单选题]The paragraph is followed by an incomplete phrase or sentence which summarizes the main idea of the paragraph. Choose the missing words of the phrase or sentence. His audience is surprised to hear that only 22 per cent of eighth-graders read for fun daily, while 65 per cent watch three hours or more of television each day. Research also indicates that average reading proficiency drops when TV viewing reaches about three hours a day. Their parents'habits are no better: a recent survey shows a decline in newspaper readership among U.S. adults.（） of television to reading.