Chinese scientist Yuan Longping, globally known for developing the first hybrid rice strain in 1973 that served as a solution     1     worldwide hunger, passed away on Saturday at the age of 91.

The scientist spent over five decades researching and improving hybrid rice,     2    has reached its third generation, feeding     3    (approximate) one-fifth of the world's population with less than 9 percent of the world's total land. In China, the annual planting area of hybrid rice has topped 16 million hectares, or 57 percent of     4    total planting area of rice. Its growth area overseas has reached 8 million hectares. His more recent achievements included developing     5    (variety) of seawater rice, or saline-alkali tolerant rice. His team planned to use the rice     6    (transform) 6.7 million hectares of saline-alkali land in China over the next eight to 10 years.

Yuan once said he had two dreams—to “enjoy the cool under the rice crops taller than men” and that hybrid rice could be grown all over the world to help solve the global     7    (short) of food.

Yuan's lifelong devotion to reducing hunger is     8    has made him a national hero and household name in China is. In 1999, an asteroid (小行星)    9    (discover) by the National Astro-nomical Observatories was named after Yuan. In 2019, he     10    (award) the Medal of the Republic, China's highest state honor.

The palace of Fine Arts was one of the 10 palaces built in 1915 for the Panama-Pacific international Expo. Set within a park, the Roman-style architecture     1     (draw) many tourists, especially wedding parties     2     use it as a background for their photos.     3     sitting on a bench or lying on a blanket on the grass, picnicking is possible. But you’ll have to share your space     4     those who live there,     5     (include) ducks, seagulls, pigeons, and swans. Even from a short distance away from the palace     6     (it), you’ll be able to see its tall columns and round tower that look like nothing else in the city.     7     (locate) on 17 acres at 3301 Lyon Street in San Francisco, the place is within     8     (walk) distance to the former military base of the Presidio. Oddly enough, during World War Ⅱ, The U.S Army used the palace to store military trucks and jeeps. On 1994, the Presidio     9     (transform) to the National Park Service, which made the final chapter in the area’s use as a military facility.     10     the happy tourists seem to appreciate is really worth!

Scientists often compare coral reefs to underwater rainforests, yet unlike the leafy plant base of a forest, corals are animals.The soft organs inside the hard parts of corals are naturally transparent and get    1    (they) famously brilliant color from algae(藻类）living inside them.

When corals experience stress from hot temperatures or     2     (pollute),they end their interdependent relationship with this algae,typically forcing them out     3    turning white, though one recent study indicates some corals turn a bright neon color when stressed.Corals are still alive when they bleach(白化），but they're     4     risk-essentially immunocompromised(免疫功能低下）－and many     5     (eventual) starve and die, turning a dark brown.

People first noticed coral bleaching events in the 1980s.The problem worsened in 2016, when an El Nino weather pattern,     6    causes warmer waters in the Pacific Ocean,     7    （mix) with an already unseasonably warm ocean and killed off a third of the corals on the Great Barrier Reef.Since then, roughly half the corals on Australia's famous reefs     8    （die) in following bleaching events, risking an underwater landscape 1,500 miles long.

Scientists around the world are looking for all kinds of ways to protect and maybe even revive corals.One option is     9     (create) more marine protected areas-essentially national parks in the ocean.Scientists say creating marine shelter, where fishing, mining,and recreating are off limits, makes the reefs     10     (healthy), and so much stronger.

Do you enjoy food, culture, entertainment, and shopping? You could be delighted at     1     (visit) Chinatown in Manhattan New York. New York’s Chinatown is     2     (convenient) located right next to Little Italy on Manhattan Island,     3     is one of the largest surviving ethnic Chinese communities outside of Asia. There are a number of     4       (landmark) in Chinatown that tourists or locals can go to see when weather permits. Chinatown, along with Little Italy in New York,     5     (list) in a historic district on the National Register of Historical Places in 2010.

If you want to try delicious food, Chinatown might be the     6     (good) place to go. Not only do they serve a special plate of Garbage Fish, but they also can take out dishes that you have no idea     7     is in them but pleasing to your taste buds nevertheless.

If you enjoy history, you will find that New York’s Chinatown is rich     8     history, culture, and civilization. It has fun for all ages. Whether you’re in Chinatown for     9     (relax) and entertainment, or to stop     10     (grab) a bite to eat, there is always something exciting going on that might grab your attention.