Read the following passage and mark the letter A, B, C, or D to indicate the correct answer to each of the questions from 39 to 45.

Stephen Cameron, Vietnam’s patient number 91, has recovered from COVID-19 and is returning home today (July 12th). The symbol of Vietnam's pandemic success, as referred to by Reuters (the ABC news), will be accompanied by a team of doctors during the flight to London.

The 43-year-old Scot, arriving in Vietnam in early March, was tested positive for COVID-19 only three days after his first flight for Vietnam Airlines, following a visit to a bar in Ho Chi Minh City that became a coronavirus outbreak. Cameron’s illness and the highly publicized efforts of Vietnam’s doctors to save him became a symbol in Vietnam of the country’s successful fight against the virus, as reported by Reuters.

The ABC news recognized Vietnam’s huge efforts to save the man, who had been critically ill and spent 65 days on life support. Doctors said at one point they considered a lung transplant as the man's lungs were 90% damaged and non-functional. With the vast majority of Vietnam’s COVID-19 patients already recovered, the news of a potential first death prompted a national outpouring of support, with dozens of people coming forward as potential lung donors.

However, like a miracle, after he woke from a coma at the end of May, there were small signs of improvement – a thumbs-up sign for an attentive doctor, a trip on to the balcony to catch some sunshine and a video of him holding a Motherwell football club scarf aloft. Every little progress was closely followed by the media and attracted great attention.

“The patient’s recovery has been like a very long flight” – Dr. Tran Thanh Linh, the deputy head of the ICU ward at Cho Ray Hospital, said during a meeting between hospital officials, the British Consulate and Vietnam Airlines representatives just before Cameron’s discharge – the Washing Post reported. “All of the health workers are overwhelmed with joy to see him fully recovered and being discharged from the hospital today.”

The UK’s Daily Mail quoted Mr Cameron: “I'm overwhelmed by the generosity of the Vietnamese people, the dedication and professionalism of the doctors and nurses working at Cho Ray Hospital. I'm going home with a happy heart because I'm going home, but it is sad that I'm leaving so many people here that I'm friends with”.

Vietnam has reported 370 coronavirus cases with no local transmitted infection for nearly three months. All recent cases are people who were infected abroad and had been under compulsory quarantine upon their arrival in Vietnam.

(Adapted from https://vietnamtimes.org.vn/)

Which of the following could best serve as the title of the passage?

I saw some boys swimming _________ the river this afternoon.