Choose the word that best fits the blank space in the following passage.Write the letter A, B, C or D on the answer sheet. There have been concerns about health problem in the area recently as the factories were reported to cause pollution. To stay free from worries, we decided (1)______ a health check with the local doctor. We phoned to make an (2)______ and at 9 o’clock the next morning, the doctor welcomed us at the door (3)______ a lovely smile. After (4)______ all necessary forms, we were given different tests. All the tests were done very quickly with the help of modern (5)______. As she did the checks, the doctor said that a lot of people were worried about air pollution and came to her for health checks like us.