Choose the best answer for the following sentence:

Over recent years there has been a marked reduction __________ the number of people who have foreign holidays.
 

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Một số câu hỏi khác có thể bạn quan tâm.

• Tính $\underset{x\to -\infty }{\lim }\frac{\sqrt{9x^2-x+1}}{x-1}$ .
  
• Số nghiệm của phương trình $\frac{\left|3-x\right|}{\sqrt{1-2x}}=\frac{2x+3}{\sqrt{1-2x}}$ là bao nhiêu?
  
  

• Cho hàm số có đồ thị như hình vẽ. Chọn mệnh đề đúng.    

• I had a glance at the article, but I haven't read it yet.
  
• Biến a được khai báo kiểu integer và có giá trị là 200. Câu lệnh Write(a); sẽ đưa ra màn hình:
  

• Tìm giá trị lớn nhất của hàm số trên đoạn .         

• Phương pháp thường dùng hiện nay để nghiên cứu các lớp đất sâu trong lòng Trái Đất là:
  
•  Kinh tế nhiều quốc gia Mĩ La tinh đang từng bước được cải thiện chủ yếu là do
  

• Frank tends_______ too much nowadays because his girlfriend has just abandoned him.

• Fill in each numbered blank with one suitable word or phrase
  The World Wide Fund for Nature (WWF) is an international non- governmental organization for the (1) _____, research, and restoration of the environment. The organization was (2)_____ as a charitable trust on September 11, 1961, in Morges, Switzerland, under the name World Wildlife Fund. It was an initiative of Julian Huxley and Max Nicholson.
  It is the world's largest independent conservation organization with over 5 million supporters worldwide, working in more (3) _____ 90 countries, supporting 100 conservation and environmental projects around the world. It is a charity, with approximately 9 % of its funding coming from voluntary donations by private individuals and businesses.
  The group says its mission is "to halt and reverse the (4) _____ of our environment". Currently, much of its work focuses on the conservation of three biomes that contain most of the world's biodiversity: forests, freshwater ecosystems, and oceans and coasts. Among other issues, it is also concerned (5) _____ endangered species, pollution, and climate change. The organization runs more than 20 field projects worldwide. In the last few years, the organization set up offices and operations around the world.