The ________(音乐家)present at the party were greatly moved by the boy’s wonderful performance.

　　51 ________________( 学了4年英语后)， we came to Huantai No 2 middle school .

　　He has ________________ (专注于他的工作)。

　　53 With days passing on，________________ I think________________我认为帮助别人是我们的职责（duty）.

　　C 阅读表达（共5小题，每小题3分，满分15分）

　　阅读下面的短文，请根据短文后的要求答题（请注意问题后的字数要求）

　　[1] Teenagers who spend hours in front of the television may have a poorer diet as young adults, a new study suggests. It's not clear, researchers say, whether television itself is the reason, but it is possible that things like snacking(吃零食) in front of the TV or seeing ads for junk food influence young people's diets. [2] The study included nearly 1,400 high school students. It showed that those who watched TV for five hours or more every day had less-healthy diets than their students five years later. As a group, they ate fewer fruits and vegetables, but ate more fast food, snack products and fried foods. [3] "We're not able to tell why," lead researcher Dr. Daheia J. Barr-Anderson said. "But we do have some speculations." People who spend a lot of time in front of the TV, especially teenagers, may have more snacks. It may influence their long-term diet quality. It's also possible that TV ads for fast food, sweets and snacks make teenagers eat more of those foods. TV time might also replace exercise time for some kids.

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