→As far as I'm concerned, nothing is                            .

→From my point of view, our library should buy some popular science books and literary books because they are very               us.

→Must you dash off?               stay for a cup of tea?

It was not until then that I suddenly realized       .

Something unpleasant must have happened to him if he didn't smile       .

This is        you should attend it.

He        when he fell off his bike.

As a teacher, I        the same mistake again and again.

Our school lies in Tianjin City, which is beautiful. In autumn, it is       .

    A new study, a project of the researchers from the University of Pittsburgh in Pennsylvania, finds the fitness tracker probably does not help with weight loss.

    The devices are designed to record your physical activity. They are usually worn around the wrist, where they measure a person's heart rate. The research team looked at two groups of individuals. The first wore a fitness tracker and took part in health counseling (咨询) with experts to consider the best weight-loss plan. The researchers compared this group with people who only got health counseling.

    The study found that those only speaking with the health experts lost nearly 6 kilograms, but those using a fitness tracker lost only 3.5 kilograms. John Jakicic, the lead researcher, questioned the use of electronic devices for weight control in place of "effective behavioral counseling for physical activity and diet."

    The study involved 470 subjects aged between 18 and 35. Some of them were overweight, while others were considered obese (肥胖的). Over three fourths of the subjects were women. All the subjects were told to increase physical activity and start on a low-calorie diet. They had their weight measured once every six months. After six months, researchers divided the group into two parts: one continued with monthly counseling, while members of the other group were given a fitness tracker. Eighteen months later, both groups "showed significant improvements in fitness, physical activity, and diet," with no major difference between groups. However, when it came to losing weight, the people who only spoke with experts lost nearly twice as much weight.

    Jakicic said, "the study's findings are important because effective long-term treatments are needed to address America's obesity." More information is needed, he added, to learn how to best use these devices to change "physical activity and diet behaviors" in adults who want to lose weight.

    If you are heading to the gyp in the hope of losing weight, try to do it before you eat your breakfast. Exercising before the first meal of the day is more 1 than after it, a British study has found. Although the 2 of exercise is well-known, people have been unsure about whether it is better to do it on an 3 stomach or a full one.

    Dr. Jason Gill, who 4 out the research, said that while exercise in itself is good, any done before breakfast may be extra good, because it 5 the body to rely on its stores off at for 6. "When people talk about losing weight, they 7 mean losing fat." he added.

    Ten men who made three 8 to his laboratory were given breakfast each time. On the first visit, the men didn't do any 9. On another, they did an hour's walk ahead of breakfast and on the third they did the walk 10 breakfast. Those who exercised 11 more fat than those who simply sat around. And those who did their walk before breakfast 12 up 33 percent more fat than those who exercised after eating. Tests showed they also 13 a bigger drop in the blood fats that raise the risk of heart disease.

    However, those who exercised after breakfast shouldn't 14. Dr. Gill said, "The biggest 15 is between doing nothing and doing something. You are still going to 16 a huge benefit. Those who exercise before 17 only burnt off around a tenth of a pound more fat than the men who had a relaxing morning. 18 they did an hour's walk everyday for about ten days, they would 19 about a pound, which is about as fast as you can really 20 to lose weight."

    Dogs are        very popular pet. Most of them just live with their families. But some dogs have very special jobs        (do). A group of dogs        (know) as "Therapy Dogs". These dogs are family pets with special training,        allows them to go into public buildings and comfort people        need. The dogs are trained to be calm and quiet. Loud noises and unfamiliar places don't frighten them. They enjoy spending time with people.

    Some therapy dogs go into places, such as hospitals and nursing homes. When the dogs visit the patients, the patients are cheered up. They have fun        (pet) the dogs and look forward to their visits. The dogs help to brighten their day. Therapy dogs can improve people's health as well. Studies show that when people pet animals, their blood        (press) and heart rates go down. They are calmer and        (they) mood improves.

    Other therapy dogs work in schools and libraries. They serve as warm and caring        (friend) to children, but they also do        (much). In one town in California, therapy dogs have become children's reading buddies. The dogs make a great audience. The children look forward to reading to the dogs, and the dogs love the attention.