1 . The research held the belief that the ability to use fins(鳍) to walk across the water affords the sharks a great advantage __________ the smaller animals they hunt. (用适当的词填空)

2 . It is assumed, for a person to be healthy, ________ yin and yang forces should be in balance. (用适当的词填空)

3 . 阅读下面材料, 在空白处填入适当的内容（1个单词）或括号内单词的正确形式。

In China, Tree Planting Day falls on March 12, but more often people plant trees during Qing Ming Festival in early April. Newly-planted trees can survive more easily with a     1     (warm) climate and frequent spring rainfall at that time.

China set March 12     2     the National Tree-Planting Day in 1979 to memorize Sun Yat-sen (孙中山),     3     died on March 12, 1925. Sun had called for planting trees.

Since 2013, President Xi Jinping has joined Beijing citizens in tree planting activities for nine years in a row. President Xi called on the public     4     (stick) to the tradition of planting trees in spring. “Students should establish an awareness of protecting     5     environment and cherish the green plants,” Xi said in 2017 when     6     (attend) a tree planting activity in Chaoyang district of Beijing.

China has seen a remarkable     7     (grow) in forest resources and afforestation(造林) projects. Nationwide voluntary tree planting campaigns in China over the past four decades     8     (see) increased participation by members of the public and nearly 79 billion trees have been planted. The campaign has made China the country with the largest increase in forest resources and the largest area of     9     (plant) forests.

In the future, China will launch more effective     10     (measure) to fulfill the country’s climate commitment to peak (达到峰值) carbon dioxide emissions before 2030 and achieve carbon neutrality (碳中和) before 2060.

4 . 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。

We believe that acts of kindness can change the world for the     1     (good). On April 28,       2     (country) across the world will unite with one common goal:to stand for kindness together. Pay It Forward Day helps conduct a series of goodness     3     (feel) across the globe.

Pay It Forward Day, a worldwide celebration of kindness,     4     (create) in 2010 in the United States, working hard to bring forward     5     concept of paying it forward to the world at large. We are excited that we now have over 80 countries     6     (participate)   in Pay it Forward Day with over 100 state and city proclamations.

Of course,     7     we all hope is that people pay kindness forward every day and make each day a little bit brighter. We believe that small acts, when multiplied by millions of people can     8     (definite) have a deep impact on the world—and on April 28th we’ll set out to prove it! For this year's international Pay it Forward Day(PIFD)we are aiming to inspire over 10 million acts of kindness around the world. Imagine the     9     (different) that would make! Join us     10     paying it forward and help spread the word about this important day!

5 . It should reveal information about ________ icebergs affect their surroundings by, for example, dumping fresh water into the ocean as they melt. (用适当的词填空)

6 . The letter says the COVID-19 pandemic ________ (bring) great challenges to many aspects of the preparation work, and the committee has adjusted requirements for volunteers in consideration of virus control and prevention. （所给词的适当形式填空）

7 . The classical gardens of Suzhou ________ (be) the most vivid specimens(样本)of culture from the East Yangtze Delta region in the 11th to 19th centuries. （所给词的适当形式填空）

8 . Some American scholars ________ (think) China could hardly realize food-sufficiency because of the limited water resources, decrease of agricultural land due to industrial expansion and the fast population growth. （所给词的适当形式填空）

9 . When replying to a Hong Kong student’s question about water, Wang explained that the water they drink ________ (recycle), noting that there is no difference in taste between regular water and recycled water and every drop of water is made full use of there. （所给词的适当形式填空）

10 . In the afternoon, we delivered a lecture to the students there. Not only ________ we give them tips on how to choose proper books for themselves, but also guided them on how to read different kinds of books. （用适当的词空调）