题目内容：

Many kids don't drink enough water daily, according to a new study. The study's lead author, Erica Kenney, at first planned to look into the amount of sugary drinks kids were drinking in schools. However, during her research she found that many kids were simply not drinking enough water.

Kenney and her team examined data from a group of 4,000 children, aged 6 to19, between the years of 2009 and 2012. The data was taken from the National Health and Nutrition Survey, a study on the health of children in the United States conducted each year by the Center for Disease Control and Prevention..

While looking through the survey results, she noticed that more than half of the kids who took part in the study were dehydrated (脱水的). Of' that group, boys were 76% more likely than girls not to have enough water in their system. Nearly one quarter of the kids in the survey reported drinking no plain water at all.

“These findings highlight(突出) a possible health issue that wasn't given a lot of attention in the past," Kenney said in a statement. “Even though for most of these kids this is not an immediate and great health threat, this is an issue that could really be reducing quality of life and well-being for many children and youth."

The United States-National Agriculture Library says average kids need between 10 to 14 cups of water every day. This water can come from a mix of drinks and foods that contain high amounts of water, such as celery, melons or tomatoes. It is also recommended that fluids（液体）come from water instead of sugary drinks that are high in calories and can lead to weight problems.

1.What was Erica Kenney's purpose in doing the study?

A. To study if kids drink enough water daily :

B. To prove that sugary drinks are harmful to kids

C. To show what kind of sugary drinks kids love.

D. To find out how many sugary drinks kids drink at school.

2.According to the findings of Erica Kenney's study, we know that ________.

A. school kids cannot find drinkable water easily

B. boys are more likely to get dehydrated than girls

C. sugary drinks are very popular with school kids

D. most kids know the importance of drinking plain water .

3. From the last paragraph we learn that kids________.

A. should drink plain water to lose weight

B. can try to take in water from sugary drinks .

C. can eat celery, melons and tomatoes for water .

D. should drink no more than 10 cups of water every day

4.The text mainly tells us that many kids_____________

A. don ' t like drinking water

B. prefer sugary drinks to water

C. are at risk of health problems

D. don ' t drink enough water daily