阅读表达（共5小题，每小题2分，满分10分）
阅读下面短文，请根据短文后的要求进行答题。（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 everyday 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.
[4] The researchers found a clear relationship between TV time during high school and diet quality of the young. The heaviest TV viewers , and those who’d watched fewer than two hours everyday had the most fruits, vegetables.
[5] According to Barr-Anderson, the findings support experts’ advice that children should watch no more than two hours of television everyday. "Parents should cut the TV time," Barr-Anderson said. She advised that parents set a good example by eating right, being physically active and controlling their own TV time.
小题1: Complete the following sentences according to the underlined one in paragraph 3. (no more than 5 words)
Some children may spend much time watching TV instead of .
小题2: What does the underlined word “It” in paragraph 2 refer to? (no more than 3 words)
小题3:According to Barr-Anderson, what should parents do to set a good example for their children? (no more than 15 words)
小题4:Fill in the blank in paragraph 4 with proper words. (no more than 6 words)
小题5:What is the passage mainly about? (no more than 12 words)