Which of the following can be inferred from the passage?

Ngoc’s personal information was leaked. She was aware of the danger of the Internet.

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 39 to 43.

Scientists have dreamed for a long time about building a 'flying train' which can float through the air above the tracks. With Maglev technology, their dreams are now a reality. Maglev trains have no wheels. Instead, powerful magnets lift them into the air and push them forward, at speeds of up to 500 km per hour.

As well as speed, Maglev has a number of advantages over other transport systems. The trains are quieter and the journey is smoother because they don't have wheels. They are also greener because they don't use fuel and so create less pollution. Right now there is only one high-speed Maglev train system in the world. It carries passengers from Shanghai city centre to the airport. However, work has started on a new, longer Maglev track in Japan. Trains will go from Tokyo to Nagoya in 40 minutes. But don't expect to ride on it on your next trip to Japan. It won't open until 2027! Then, in 2045, the line will extend to Osaka.

There is one major problem with Maglev technology: it is incredibly expensive to build the tracks. Transport planners predict that the Tokyo to Osaka line will cost 91 billion dollars. The high cost means that Maglev technology probably won't replace other forms of transport in the near future. However, the technology is still in development and somebody might find a cheaper and simpler way to build the tracks. And then, who knows? In the future, some of us might fly to work by train.

(Adapted from Navigate by Caroline Krantz and Julie Norton)

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 34 to 38.

An increasing number of people nowadays are choosing to work from the comfortable environment of their own homes rather than (34) _______ the troublesome process of travelling to work every day. The emergence of teleworking, as it is commonly called, is due to the extensive use of computers in the workplace. Working conditions at home are more relaxed and can actually be timed to (35) _______ oneself. There is no stressful need to get to the office on time, no frustration (36) _______ is caused by the rush-hour traffic as with commuting, and it isn't necessary to face unpleasant colleagues on a daily basis.

(37) _______ , there is a negative side. For example, some people might suffer from boredom if they spend all day at home, or they might feel the temptation to spend time doing (38) _______ jobs around the house.

(Adapted from FCE Use of English by Virginia Evans)

According to paragraph 1, Sean O'Brien didn’t realise that _______ .

Tuan forgets to charge his phone last night so now its battery is running low.

Which of the following is true about Sean O'Brien according to the passage?