______ are the formal rules of correct or polite behavior among people using the Internet.

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions. 

He had hardly left the office when the phone rang. 

My teacher reminded me _____ my essay carefully before handing it in.

They started on the study excitedly. They had prepared all the need things for it.

Liam and Kara are having a discussion about learning new skills. 

Liam: I think that self-leadership is a crucial skills for everyone nowadays” 

Kara: “_______. It greatly helps us achieve success.” 

Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) CLOSEST in meaning to the underlined word(s) in each of the following questions. 

He has a thorough knowledge of the Vietnamese history. He can answer any questions about the country’s milestones. 

I could not get the job because I did not speak English well. 

Some people were diagnosed with having Covid-19. They had exposed to so many people before they got the health check result.