Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 30 to 34 

     As computer use becomes more common, the need for security is more common than ever. One of the greatest security threats in the online world is computer hacking.  

     Computer hacking is the unauthorized access to a computer or network of computers. Hackers are people who illegally enter systems. They may alter or delete information, steal private information, or spread viruses that can damage or destroy files. But how exactly can a hacker get into a system to do these things?  

     Most hackers use information called protocols that are built into computer software. These protocols allow computer to interact with one another. Protocols are sort of like computer police officers. When a computer connects to another system, the protocols check to see if the access is valid. The protocols can also determine how much information can be shared between the two systems. Hackers can manipulate the protocols to get unlimited access to a computer system. 

     In fact, just the act of entering a computer network is considered hacking. This is commonly called passive hacking. Passive hackers get a rush from just being able to access a challenging system like a bank or military network. Another kind of hacker tries to do damage to a system. After hacking into systems, these hackers release viruses or alter, delete, or take information. Known as active hackers, they are, by far, the more dangerous of the two.  

     The easiest way to protect a system is with a good password. Long and unusual passwords are harder for hackers to guess. For even greater security, some online services now use “password-plus” systems. In this case, users first put in a password and then put in a second code that changes after the user accesses the site. Users either have special cards or devices that show them the new code to use the next time. Even if a hacker steals the password, they won’t have the code. Or if the hacker somehow gets the code, they still don’t know the password. 

What is the main idea of this reading?

The expansion of the natural history museum is most _______ the cause of significant revenue increases.

______ he was sick, he still turned up for his guitar lesson.

Stop acting like a child. In a few weeks, you'll be coming of _______ and nobody will tolerate your foolish behavior any longer.

Read the following passage and mark the letter A, B, C, or D on your answer sheet to choose the word or phrase that best fits each of the numbered blanks from 25 to 29 

     Prime Minister Nguyen Xuan Phuc has delivered Vietnam’s strong message, aspiration, and determination to become a “country of renovation and creativity” and an economy with globally extensive (25) _______ when engaging in every activity of the World Economic Forum (WEF) 2019 in Davos, Switzerland. 

     He participated in 37 activities where he and heads of State and Government leaders of 50 countries and executives from (26) _______ groups around the globe discussed and dialogued matters relating to the forum’s theme “Globalization 4.0: Shaping a Global Architecture in the Age of the Fourth Industrial Revolution”. 

     Prime Minister Phuc said the Fourth Industrial Revolution is “knocking” on every enterprise and bringing profound changes that no country can be an outsider, and (27) ______ Vietnam’s wish to become one of the passengers at the (28) ________ of the Industry 4.0 train, and enthusiastically work with other countries to build a wealthy world.  

     In Davos, PM Phuc and WEF President Borge Brende had a dialogue themed “Vietnam and the World”, which is the first-ever event on Vietnam held by the WEF. Through the dialogue, PM Phuc conveyed strong messages about Vietnam’s development and international integration, asserting that (29) _______ the current circumstance, Vietnam has maintained an economic growth and socio-political stability that demonstrates itself a reliable destination for foreign investors coming to do business.

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions. 

I was upset to learn that my first opponent would be Sam Muller, who _______ part in tournaments for no less than ten years.

Despite the roadblock, the police allowed us to enter the restriction area to search for our friends.

Professor Wallace has been given a prestigious award in _____ of his pioneering research in treating the AIDS patients.

Mark the letter A, B, C, or D on your answer sheet to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions.

Of course, we don’t need this dictionary at present, but in the long ____ it may prove useful.

Had they arrived at the sale early, they ______ a better selection.

Mark the letter A, B, C, or D on your answer sheet to indicate the word that differs from the other three in the position of the primary stress in each of the following questions.