Many people count the number of steps they walk each day. But how many steps should we take to stay ________? A new study has the answer.

The study was carried out by scientists from the Johns Hopkins University School of Medicine. They looked at seven years of health and exercise results from more than 225, 000 ________ around the world. These adults were around 64 years old. Some of them were in good health, ________ others weren’t. According to the study, walking 4, 000 steps a day can help people to live well into old age. Walking can reduce the risk of dying from diseases.

“Four thousand steps is about a 30-to-45-minute walk, ________ about three to four kilometers,” said Dr. Seth Shay Martin, one of the scientists. “It’s not a magic number. You don’t need to walk that exact number of steps.”

He added that in fact people who walk an extra (额外的) 1, 000 steps a day have a ________ 15 percent lower risk of early death. “The more steps you walk, the better!” he said.

The Secret Garden is a novel for children written by Frances Hodgson Burnett. It came out in 1911 and is considered to be one of Burnett’s best ________.

10-year-old Mary lives with her wealthy British family. Without care from her busy parents, she becomes selfish (自私的) and seldom feels happy with the servants. An illness kills all her family, leaving her ________. She is sent to England to live with an uncle called Craven at his huge house. ________, her uncle is hardly at home.

A servant tells her about Mrs. Craven’s secret garden, which was ________ 10 years ago by the uncle when his wife died.   Mary can’t help ________ ways to enter it. By talking to the old gardener, Mary finds an old key ________ the door of the garden behind thick plants. She goes into the secret garden. She begins to take care of the garden. Working in nature ________ her into a kinder and more outgoing girl.

For several nights Mary hears strange cries. She is ________ but curious (好奇的). Following the sound, she sees her uncle’s son Colin. He hasn’t stood up for years. With the help of Mary and another child, he gets the ________ to walk. The three children plant flowers in the garden together and become ________ and happier. Seeing the amazing changes of his son and the beautiful garden, the uncle decides to stay at home forever.