题目内容：

    With their long histories, the United Kingdom’s universities have earned reputation and become favored destinations for many international students. However, while many people dream of attending these institutions, a growing number of the schools have fallen victim to cheating scandals (丑闻) in recent years.

The Telegraph reported that investigations for cheating have risen at Leeds University, from 127 in 2014/15 to 516 last year. Over the same period, cases at Queen Mary University of London increased from 104 to 248, and Nottingham University tripled to 514.

The increase has been linked to the rise of essay mills (论文作坊). These are companies that, for a fee, provide original essays, written by real people, for specific university assignments. Widely advertised on social media, these essay mills target those who struggle with their university workloads.

Even though many students have the ability to complete work on their own, it is believed that the pressure of too many deadlines and a lack of discipline encourage them to use essay mills.

In response, many universities have introduced new measures, such as oral exams to test students’ knowledge of assignments and subject areas. New software is also helping catch cheaters. Currently, most UK universities use Turnitin to check assignments for plagiarism (剽窃). Now it is being used to analyze students’ natural writing styles. This way, it may detect abnormal changes in their written assignments.

Despite the risks, essay mills seem like an easy ticket to a degree. However, a majority do not deliver the A+ essays they promise, and students are vulnerable to being cheated and blackmail (敲诈). According to the BBC, multiple Coventry University students were blackmailed up to $5,000 (35,190 yuan) after using an essay-writing service last year.

A Nottingham University spokesman told the Guardian, “The best way to deal with essay mills is for the government to legislate (立法) against them and block their webpages at a national level.”

Currently, these sites are legal in the UK, but other countries, including New Zealand and Australia, have banned them altogether. Students in Australia could even face two years in jail and a $210,000 fine if found guilty of cheating.

1.Why do many students turn to essay mills, according to the writer?

A.Because they want to pay for top marks.

B.Because essay mills are popular on social media.

C.Because they find college work is too difficult.

D.Because they have heavy workloads and they are undisciplined.

2.The underlined word “vulnerable” in Paragraph 6 is closest in meaning to “_______”.

A.knowing little about something

B.paying close attention to something

C.well prepared for something

D.likely to suffer from something

3.What is the best way to deal with essay mills, according to the Nottingham University spokesman?

A.The government should make laws to ban them.

B.Students found guilty of cheating should be put into jail.

C.Teachers should change the way of testing their students.

D.Universities should better manage their campus websites.

4.What is the main idea of the article?

A.The increase of cheating at UK universities.

B.The rise of essay mills in the UK.

C.Pressures faced by students in the UK.

D.Attitudes toward plagiarism in different countries.