Questions 1 to 10 are based on the following passage.
Finally, some good news about airplane travel. If you are on a plane with a sick passenger, you are unlikely to get sick. That is the  ____1____  of a new study that looked at how respiratory (呼吸道) viruses ____ 2____  on airplanes. Researchers found that only people who were seated in individual - had a high risk of catching the illness. All other passengers had only a very  ____3____  chance of getting sick according to the findings. Media reports have not necessarily presented. ____4____  information about the risk of getting infected on an airplane in the past. Therefore , these new findings should help airplane passengers to feel less  ____5____  to catching respiratory infections while traveling by air.
Prior to the new study. litter was known about the risks of getting  ____6____  infected by common respiratory viruses, such as the flu or common cold, on an airplane, the researchers said. So, to  ____7____  the risks of infection, the study team flew on 10 different  ____8____  in the US.  ____9____  side of a person infected with flu, as well as those sitting one roe in font of or behind this individual, had about an 80 person chance of getting sick. But other passengers were  ____10____  safe from infection. They had a less than 3 percent chance of catching the flu.

A) accurate
B) conclusion
C) directly
D) either
E) evaluate
F) explorations
G) flights
H) largely
I) nearby
J) respond
K) slim
L) spread
M) summit
N) vividly
O) vulnerable