Passage Twenty-One
原文：

The use of renewable energy sources has been increasing in recent years. Solar and wind energy, in particular, have gained popularity as they are clean and sustainable. Governments around the world are also providing incentives to encourage the adoption of renewable energy.

What is the main reason for the increasing use of renewable energy sources?
A) They are more expensive than traditional energy sources.
B) They are clean and sustainable.
C) Governments are not providing incentives.
D) Traditional energy sources are more reliable. 答案解析：选B。文章提到近年来可再生能源的使用在增加，尤其是太阳能和风能，因为它们是清洁和可持续的，故选B.
Passage Twenty-Two
原文：

The company has decided to implement a new project management system. The goal is to improve efficiency and reduce delays in project completion. Employees will receive training on how to use the new system effectively.

What is the expected outcome of the new project management system?
A) Increased delays in project completion.
B) Improved efficiency and reduced delays.
C) Employees will be less trained.
D) The company will have fewer projects. 答案解析：选B。文章提到公司决定实施新的项目管理系统，目标是提高效率并减少项目完成的延误，员工将接受如何有效使用新系统的培训，故选B.
Passage Twenty-Three
原文：

The city has experienced a significant increase in the number of bicycles on the streets. This trend is attributed to the growing awareness of the environmental benefits of cycling and the improvement of cycling infrastructure.

What is one reason for the increase in the number of bicycles on the streets?
A) The decrease in the number of cars.
B) The improvement of cycling infrastructure.
C) The increase in the price of bicycles.
D) The reduction in the number of pedestrians. 答案解析：选B。文章提到城市街道上自行车数量显著增加，这一趋势归因于人们对骑自行车环境效益的日益关注以及自行车基础设施的改善，故选B.
Passage Twenty-Four
原文：

The school has introduced a new program to promote physical fitness among students. The program includes regular physical education classes and after-school sports activities. The aim is to help students develop healthy habits and improve their overall well-being.

What is the aim of the new program introduced by the school?
A) To reduce the number of sports activities.
B) To help students develop healthy habits and improve their overall well-being.
C) To increase the students' academic performance.
D) To decrease the students' participation in physical education. 答案解析：选B。文章提到学校引入新项目以促进学生身体健康，项目包括定期的体育课和课后体育活动，目的是帮助学生养成健康习惯并提高他们的整体福祉，故选B.
Passage Twenty-Five
原文：

The government has launched a campaign to promote cultural heritage preservation. The campaign includes educational programs and financial support for restoration projects. The aim is to raise public awareness and protect the nation's cultural treasures.

What is the aim of the government's campaign to promote cultural heritage preservation?
A) To decrease public awareness of cultural heritage.
B) To raise public awareness and protect the nation's cultural treasures.
C) To reduce financial support for restoration projects.
D) To eliminate educational programs. 答案解析：选B。文章提到政府发起促进文化遗产保护的活动，活动包括教育项目和对修复项目的财政支持，目的是提高公众意识并保护国家的文化瑰宝，故选B.