NASA is planning its first ever mission to bring dirt and rocks from Mars back to Earth, but before that historical event happens, the space agency has to figure out     1     (exact) how to protect our home planet from any alien microbes (微生物) that might come along.

This week, the agency is holding public meetings and looking for feedback on its plan     2     (land) a spacecraft carrying Martian specimens at a U.S. Air Force testing range in Utah in the early 2030s.

“Maybe this is the most important environmental     3     (assess) that humans have ever done,” says Peter Doran, a geologist at Louisiana State University who studies life in extreme environments. Having a rock sample from Mars here on Earth would let researchers run detailed lab tests to look for evidence of     4     this cold, harsh, rocky world was once habitable (可居住的) or maybe even inhabited.

For researchers, this is     5     long-held dream. Discussion about such a mission     6     (go) on for decades, and it will cost billions of dollars to accomplish. Until recently, there hasn’t been a lot of focus on the details of the sample return facility because     7     (science) didn’t think it was going to happen.

NASA officials are working out a plan to safely collect the samples: A spacecraft would land on Mars and launch a container full of the previously     8     (collect) rock samples into orbit around the planet. Once in orbit, this container could be swallowed by another container—    9     a big fish eating a little fish—to keep anything that had touched Mars inside and then it would     10     (seal).

Climate protection strategy is fascinating the globe during the 19th Asian Games, not just athletic talent .    1     (boost) climate cooperation, China, with the centuries old history and unique culture, is using green measures. Hangzhou city has adopted a     2     (practice) eco approach. The emphasis of the Asian Games     3     (be) on “green, intellectual, frugal, and civilized” contests, reflecting a trend toward more ecologically friendly and sustainable practices in major events.

Avoiding fireworks during the opening ceremony promotes environmental awareness. Traditional fireworks displays are fun     4     pollute the air. The Asian Games intend to exhibit a     5     (commit) to sustainability while providing an engaging and memorable experience     6     all guests by replacing this event with digitally powered visual effects and sound presentations. The Asian Games’ eco friendly licensed items include backpacks     7     (make) from recycled bottles and frisbees from rice husks (谷壳). As all Asian Games venues and facilities employ green energy, the event’s green elements demonstrate China’s recent green transformation and     8     (it) responsibility and promise to meet the dual carbon goals.

The Games Village gave residents a “Low Carbon Account” as part of the green measures. Carbon points     9     (use) in promoting low carbon habits including p late recycling, green commuting, and plastic-free purchasing. Points could be traded for low-carbon Olympic mascots and other prizes. China continues to carry out a climate change policy, develop     10     better carbon market, and participate in global climate governance. China aims to peak and neutralize carbon dioxide emissions by 2030 and 2060.

Jaws, the 1975 film, tells the story of a great white shark that attacks s and kills swimmers. In the opening scene, a woman swimming at night in a dark sea     1    (pull) underwater suddenly. She surfaces, cries in fear, then disappears forever.

People have always been scared of sharks, but Jaws made things even     2    (bad). It made people     3    (frighten) of sharks, especially of the great white shark. Many people who saw the film started to believe that sharks were bad animals that     4    (eat) humans. Some people stopped swimming in the sea, afraid of the horrible creature from the film. Other people started fishing for sharks,     5    (kill) as many as they could. At that time, nobody cared if sharks were killed,     6    how many were killed. People just wanted them killed.

Jaws was     7    great success, attracting huge audiences and winning many awards. It strengthened people’s long-held idea of the great white shark     8    a dangerous animal.

    9    (fortunate), not everyone who watched the film Jaws became afraid of sharks-some became interested in understanding them. Today, as we learn more about sharks, more people than ever want to protect them from     10    (extinct).