题目内容：

For some students, getting better grades can seem like an impossible task sometimes. With the challenges(挑战) of school, just paying attention in class or studying hard isn’t always enough. But what if there were other ways for students to improve their grades? For parents and students who have ever wondered if this is possible, now you can rest easy. Research suggests that a person who likes doing activities can improve their grades.

Scientists think that those students who are active are not just exercising their bodies, but also exercising their brains(大脑). In turn, they can be able to improve their grades at school.

In the most recent study, researchers found that when children played for half an hour each day, they were better at organizing(组织) their schoolwork as well as doing project work and learning traditionally “difficult” subjects, such as maths.

What does this mean for children who aren’t active? Researchers think that if kids don’t get enough activities, they are going to be at a disadvantage when it comes to school performance.

In the research experiment, a group of children skipped with ropes(跳绳), played basketball and did a number of other games or exercises. Another group of children didn’t do any activities. They took part in testing both before experiment and after the experiment. Testing was mainly for maths and reading skills. Results showed that the children in the activity group did better on the tests than those who had no activity.

All work and no play will not only make Jack a dull(迟钝的) boy, but will also negatively(消极地) affect his grades in school, according to a new study published in the Journal of Pediatrics.

Parents complain(抱怨) children today are actually less active and they always worry about their grades. Dr. Belton, an expert, said, “If you’d like to see your kids do better in school, have them close their books, set down their pencils and go outside to play.”

1.What does the underlined words “rest easy” in Paragraph 1 mean?

A. Stop worrying.    B. Keep working.

C. Continue learning.    D. Study hard.

2.What kind of children is better at organizing their schoolwork in the most recent study?

A. They study all the time.

B. They play for half an hour every day.

C. They finish their homework on time.

D. They do some reading after class every day.

3.In Paragraph 5, what does the research experiment want to show us?

A. Doing activities is bad for the students.

B. Doing more homework can get better marks.

C. The children in the activity group did better on the tests.

D. Children who didn’t do any activities did better on the tests.

4.To help children get better grades, parents should _____.

A. ask the researchers for help

B. help them to organize their schoolwork

C. encourage them to do more activities

D. let them solve problems by themselves

5.What is the best title of the passage?

A. Studying hard.    B. Taking part in testing.

C. Doing activities is interesting.    D. Being active is helpful for better grades.