Milwaukee, Wisconsin, is road testing a new way to keep winter roads ice-free by spreading on them cheese brine, the salty liquid     1    (use) to make soft cheeses, like mozzarella(马苏里拉奶酪).

Wisconsin, also called “America’s Dairyland”, is famous for its cheese. The state produced 2.8 billion pounds of cheese last year! As a result, there     2    (be) a lot of leftover cheese brine.     3    (dispose) of the brine can be expensive. So what should cheese makers do     4     the waste?

Cheese brine has salt in it,     5    , like the rock salt, helps lower water’s freezing point.

    6    (normal), towns use rock salt to de-ice streets. The salt lowers water’s freezing point, causing ice     7    (melt). But using cheese brine could help both cheese     8    (produce) and cities save money, while keeping roads safe.

In addition to saving money, cheese brine could also be a more eco-friendly option. Many people suspect that all the rock salt used every winter     9    (harm) the environment, because road crews spread about 20 million tons of salt on U. S roads every year!     10    , by spreading cheese brine on streets before adding a layer of rock salt, Milwaukee may be able to cut its rock salt use by 30 percent.

More than 11,000 scientists from 153 countries have sounded the alarm on climate change. In a paper     1     (publish) last week in the journal BioScience, they signed a declaration (声明) stating clearly that planet Earth is facing a climate emergency, saying that if no changes     2     (make), the world will face untold suffering. The evidence that the scientists collected reveals an undeniable truth    3     human activities have been causing global warming from the fast rise of fossil fuel consumption    4     the increase in greenhouse gas emissions (排放) over the past 40 years.

The scientists also gave some instructions to fight against global warming,     5     (propose) six actions to prevent further disasters: stabilizing population     6    (grow) by investing into family-planning services and girls’ education, replacing fossil fuels, cutting the emissions of climate pollutants, eating less meat, restoring and protecting ecosystems, and building     7    carbon-free economy.

The scientists say the climate crisis is     8     (close) related to human activities, so they call on people     9     (change) their life styles. But these measures are comparatively abstract.    10    , it is high time for policymakers to figure out more practical measures that can bring down carbon emissions.

Ever since I was a girl, I have been pushing my limits,    1    (live) my life to extreme and putting extra efforts to set myself apart    2    my competitors. Some of my friends and family members are     3     (concern) about me and my health,    4     could have made me angry and defensive. But deep down, I know parts of    5     they say are true.

To be honest, I have fears as     6    professional athlete on a day-to-day basis, thinking about not being the top. I am always tired. And I also ruin family occasions for my training     7    (frequent)

However, it boils down to this：if my goal is to be the best, I had better be committed to my sport even if it means     8    (get) injured. Doing what we do as athletes makes us outstanding. Call it unhealthy or abnormal if you want,     9    these are not the words for anyone who    10    (strive) for greatness.

On the west bank of the Mississippi, there is an unusual house with a white fence, preserved (保存)     1    a museum in memory of its former owner — Mark Twain. It is said that many of the     2     (character) and stories from his novels     3     (base) on real-life experiences that he had there as a boy. Mark Twain’s family moved to this house in Hannibal, Missouri when he was 8 years old. However, the family was so poor that they had to move out of the house for a while,    4     (live) above a local drug-store in exchange for his mother’s     5     (serve) as a cook. They managed     6     (move) back long after his father’s death, in 1847. Ten years     7     (late) at the age of 22, Mark Twain started to work as a journalist on a riverboat,    8    he wrote many famous books. These books include The Adventures of Huckleberry Finn,    9    anti-racist story that wins its readers’ heart but is     10     (fierce) criticized for using racial terms.