162. Can youme out with this maths problem. I am not very good at maths.

Do you know the reason _________ pilots turn off the plane’s lights before taking off? —The practice is for the passengers to adjust to the dark _________ an emergency.

My father is a reporter. He works in a ___________.

Would your brother go for a picnic. —If I don’t go,__________ .

Tom and Mike enjoy __________ TV.