In the following passage some words have been deleted. Fill in the blanks with the help of the alternatives given. Select the most appropriate option for each blank.
The flight was packed. There were (1)______ parents with small children. Specifically, a three-year-old boy (2)______ the row in front of me (3)______ announcing his presence by letting (4)______ ear-piercing shrieks every 45 seconds. I settled (5)______, hoping the kid would calm down.
Select the most appropriate option to fill in blank No.4.