1 . 阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。

A recent research shows that 86% of the world’s rivers have been damaged by human activities. The research     1     (conduct) by experts from a university in Toulouse, France,     2     examined data on over 2,500 rivers around the world.     3     (look) into changes in biodiversity (多样性) over the past 200 years, the scientists discovered that biodiversity in over half of the rivers has been seriously damaged by humans. The researchers said there were many reasons     4     this damage. A big reason is the     5     (introduce) of new species of fish into rivers. Other reasons include pollution, dams, overfishing, farming     6     climate change.

Unsurprisingly, the worst-hit rivers are in western Europe and North America. This is because these regions have large and rich     7     (city) crowded with people. The lead researcher Brosse said: “Rivers which have the most economic development around them, like the Mississippi River, are the most     8     (strong) affected.” The River Thames in London was one of the worst-affected rivers in the study. The least-affected rivers are in Africa and Australia. This is probably due to a     9     (slow) rate of industrialization in Africa and smaller population around rivers in Australia. Brosse added that rivers in many rich nations are unrecognizable compared with how they     10     (be) 200 years ago.

2 . Directions: After reading the passages below, fill in the blanks to make the passage coherent and grammatically correct. For the blanks with a given word, fill in each blank with the proper form of the given word; for the other blanks, use one word that best fits each blank.

(A)

Concerns about microplastics are not new. They’ve been growing for more than a decade. Over the past two years, however, many creative solutions     1     (emerge)to address the problem on a local level, ranging from hoovering beaches to shooting bubbles up from river bottoms. Still, experts say there’s a need for a huge, coordinated effort     2     we want to curb the global issue: The world produces 400 million tons of plastic annually, and much of that material breaks down into tiny pieces that now pollute our planet.

The term microplastics was coined in 2004 by marine ecologist Richard Thompson after he discovered tiny bits of plastic littering British beaches. Since then, scientists have found microplastics—fragments less than 5 millimeters wide-nearly everywhere: in the deep sea, in Arctic ice, in the air. Even inside us.

A 2019 study in Environmental Science Technology estimated humans take in up to 100, 000 bits of plastic each day. It’s not just the physical presence of plastic inside the body     3     poses a potential problem; plastic’s chemical additives might affect different species’ tissues and organs, according to a 2021 study in Environmental Toxicology and Chemistry. However, there is disagreement in the literature as to how much microplastics     4     (harm)species, including humans. Some say larger pieces may pass right through our bodies while the     5     (tiny)pieces could enter our cells. More research is needed.

For a global view of this vast issue, some scientists in 2020 created a public database to track plastic removal innovations. For example, Hong Kong Polytechnic University researchers presented     6     unique idea in April at the Microbiology Society’s Annual Conference: a bacteria biofilm that could attract and trap microplastics at a wastewater treatment plant,     7     they flow into rivers and oceans.