Read the following passage and mark the letter A, B, C, or D to indicate the correct answer to each of the following questions.

     Ho Chi Minh City faces significant air pollution challenges. To solve the issue, the local government launched the "Clean Air Campaign" in 2023, aiming to reduce air pollution levels and improve the overall air quality in the city.

     The campaign involves several key initiatives. First, the city has introduced stricter emissions standards for vehicles. This means that older, more polluting cars and motorcycles are being phased out, and residents are encouraged to switch to electric or hybrid vehicles. Additionally, there is an increased investment in public transportation, with bus routes and metro lines.

     Another major component of the Clean Air Campaign is the promotion of green spaces throughout the city. Parks and gardens are being developed in urban areas to help absorb pollutants and provide residents with cleaner air. Tree-planting events are regularly organized, involving community members in the effort to green their city.

     Public awareness and education are also critical aspects of the campaign. The city government has partnered with local schools and organizations to educate citizens about the importance of air quality and ways to reduce pollution in their daily lives.

     Early results from the Clean Air Campaign are promising. There has been a noticeable decrease in air pollution levels, and many residents report an improvement in their health and overall quality of life.

(Adapted from: https://e.vnexpress.net)

1. What is the main purpose of the Clean Air Campaign?

A. To improve the city's infrastructure                              B. To reduce air pollution levels

C. To increase public transportation routes                      D. To promote tourism in the city

2. The phrase "phased out" in paragraph 2 is closest in meaning to ______

A. eliminated                        B. introduced                       C. repaired                       D. sold

3. According to the passage, what is one way the campaign promotes green spaces?

A. Constructing new roads                                                B. Organizing tree-planting events

C. Building new factories                                                  D. Reducing public transportation

4. The word "their" in paragraph 3 refers to ________

A. pollutants'                                                                     B. tree-planting events

C. community members'                                                   D. urban areas"

5. Which of the following is NOT a component of the Clean Air Campaign?

A. Stricter emissions standards for vehicles

B. Increased investment in public transportation

C. Constraction of new industrial zones

D. Public awareness and education