D. Visitors can enjoy both eastern and western historical cultures in Macao.

23. What is the author's purpose in writing the text?

　A. To advertise coming events.

　B. To encourage people to do sports.

　C. To introduce something attractive in Macao to visitors.

　D. To tell about the history of Macao.

Online schooling is becoming an increasingly popular choice for many students across the world. A recent report found that more than 6.3 million students in the US took at least one online course in fall 2018, a 5.6 percent increase from last year.

As more and more students choose to study online, some digital communities appear, just like they would do in a traditional school. Online course offers more than just an education behind a computer screen; building relationships with those around you via technology provides a rich learning experience. According to the report, 77% of teachers think highly of online courses. They believe that online learning is as strict as traditional learning and benefits students a lot. They can gain more knowledge and get more meaningful information. Nearly 70% of all students find online classes as good as or better than traditional classroom classes. An increasing number of universities are offering online courses, too. Studies show that 62.4% of higher education schools offered at least one online program.

For college students, online learning is a cost-effective choice. The advantage cost of a traditional degree is $85,000, while the average cost of an online degree is $30,000.

Online learning tools, such as e-books and other resources, are another benefit of distance learning. Unlike heavy textbooks, e-books are easy to carry and can be used on a smart phone or a laptop. E-books and videos are also great choices for learners who may find the text ineffective. As more and more colleges offer online courses, quality online education is becoming increasingly accessible. For students whose families are in an ever-changing environment, these online classes are the most beneficial. They allow those students to enjoy their lifestyle while continuing to grow socially and professionally.

24. How many students took online courses in 2017 in the US?

A. About 5 million. B. Around 6 million.

C. Less than 5.6 million. D. More than 6.3 million.

25. What does Paragraph 2 mainly talk about?

A. The disadvantages of traditional classroom class

B. The advantages of studying online.