题目内容：

    Are you having trouble concentrating when you’re reading a book or listening to a lecture? This list of activities might help to improve your study habits.

Make a List. We often have trouble paying attention to one thing because our brain wants to think about something else. 1. You don’t worry about whatever else you should be doing.

Sleep More. Studies show that people who sleep fewer than eight hours a night for a period of time have slower response systems and more difficulty recalling information. 2.

Eat Healthier Foods. Many people enjoy foods high in fats and sugars. 3. They might give you a temporary burst of energy. However, that energy is soon followed by a crash.

Reduce Screen Time. This may be the most unpopular suggestion among young people. Screen time --- or time spent looking at cell phones, televisions, computer screens, has a clear effect on the attention span. 4.

5. Concentration improves for students who participate in team sports. It could be that being active is helpful in this way. Participating in a sport trains your brain to concentrate on specific tasks, and shut out other thoughts.

A. Be active.

B. Practice more.

C. These foods can provide enough energy for focusing.

D. But these foods can’t be helpful enough when it comes to focusing.

E. That is bad news for teens who stay up studying the night before a test.

F. Researchers advise parents to limit it when their children need to be focused.

G. By writing down all the things you need to do, you’ll gain a sense of control.