Read the following passage and mark the letter A, D, C or D on your answer sheet to indicate the best option to complete each of the following numbered blanks.

UFO SPOTTED OVER NEWYORK

A UFO sighting over New York's Statue of Liberty has gained a YouTube video a lot of attention because people can see the object (Câu 16) ______ over the city. Scott Kensington uploaded the video on December 10, explaining that his wife and sister filmed the UFO (Câu 17) ______ they were visiting New York. They thought that the object was (Câu 18) ______ balloon   at first but then the object (Câu 19) ______ made them surprised suddenly stopped moving and hovered in one place. Some people say that the video is proof that aliens exist, while others are convinced that the object is only a solar balloon. UFO expert, Nigel Watson, (Câu 20) ______ a decision to study the video and also believes that the object is just a solar balloon or perhaps a drone taking pictures of landmarks.

A UFO sighting over New York's Statue of Liberty has gained a YouTube video a lot of attention because people can see the object (Câu 16) ______ over the city.