The flight to Antarctica was delayed by the lack _________information about the weather conditions there.

Who are the teenagers gathering atthe school gate— Well, if you _____ know, they are allmy visiting students

of the crowded bus __________, who wasdressed in a black suit and waving to a woman

Most parents are not _____ the danger of their babies’ eating jelly, which causes most unfortunate incidentsto happen [ ]

I want to thank my friend John, without _____ help, I wouldn’t have been saved