Scientists found a prehistoric ancestor of an arrow worm (箭虫)among a group of fossils (化石)at two national parks in Canada. The fossils     1     (find) in what is now British Columbia, but was once an ocean.

The sea worm was 10 centimeters long and had 50 spines (刺)on     2     (it) head. The spines could close suddenly     3     (catch) smaller sea creatures.

The scientists say it lived 500 million years ago and is very different     4     anything alive now. Derek Briggs is a scientist from Yale University. He led     5     research. He said the creature     6     (be) larger than today's similar worms. The arrow worms of today have teeth instead of spines.

Briggs said the worm was     7    (probable) a good hunter because it had so many spines. The scientists said it is difficult to find evidence of these prehistoric worms because their bodies decayed (腐烂)so quickly. But this     8     (discover) was in such good shape, so they were able to make a good guess about how the worm looked.

Researchers were able to make a     9     (detail) drawing of how they think the worm moved in the ocean. Doug Erwin works for the Smithsonian Institution in Washington, D. C. He was not involved in the research. He said the breakthrough will help scientists     10    (well) understand the worms and other life from this ancient period than before.

Eating enough fruits and vegetables is     1     most people associate with good health habits. But just as important to healthy living are frequent doses (剂量) of laughter and humor—both proven to have     2     direct effect on health.

According to Wendy Shepard, clinical nurse specialist at Hopkins Bayview, laughter has     3    (definitely) physiological effects on the body. Laughing is like inside jogging. It     4    (clean) the respiratory (呼吸的) system, stimulates the digestive tract, increases heart rate and blood circulation and lowers blood pressure.

    5    (fortunate), many people don’t use humor enough when     6    (deal) with everyday life situations. Many wait for humor     7    (happen) to them instead of making it happen. “Humor is more than just laughing at a joke. It can become a way of life if you open yourself up to a new attitude,” says Shepard. “The greatest thing about play, creativity and laughter—all components (成分) of humor—is that you not only help     8    (you), you help others.”

Shepard suggests that everyone relax and lighten up. It can be as easy as focusing on fun things to pick up at a dollar store. Shepard often travels with a grab bag of things to help make people smile. Of course, making humor a part of your life 365 days a year doesn’t mean you have to carry a grab bag, put     9     a clown (小丑) nose or tell jokes     10     those things are fun in the right situation. Instead, look for ways to make the things you already do more fun, such as laughing with co-workers and smiling at people you don’t know.

Young Chinese are fighting against society through a simple act of resistance: lying down. Examples of the “tangping”, or “lying flat”, way of life     1     (include) not getting married, not having children, and refusing to work extra hours or to hold a job at all. “I stay at home and sleep and watch television series.” said Zhang, who described herself as “lying flat” for the last two weeks     2     leaving her job in the film industry in Wuxi.

“Tangping”     3     (emerge) over the last few months. Some compare them to the 1950s Beat Generation in the United States.     4     (other) call their behavior a form of nonviolent resistance. “People realize there is no upward mobility,” said Yicheng Wang, a PhD student in political science at Boston University. The term developed after     5     April post on the Tieba forum, whose author, unemployed for the last two years, described a low-effort, low-cost lifestyle consisting of just a few months’ work out of the year.

“Lying flat is my movement,” he     6     (write), referring to the Greek philosopher Diogenes, who was known for living in a large container. He posted a picture of himself lying in bed in the middle of the day with the curtains     7     (draw).

But as “tangping” gained     8     (popular), it also brought a level of dishonor. Nanfang Daily called the philosophy “shameful”. Global Times made light of it describing “lying flat” as “not a serious philosophy”.

For Zhang in Wuxi, lying flat is not about giving up or withdrawing from society. “Many people want to lie down because 996 is too     9     (tire), ” she said, referring to the constant hours common in tech industry,     10     the staff are expected to work from 9 a. m. to 9 p. m. , six days a week. The philosophy is also about giving oneself a break.