Security devices at airports are ______ to spot weapons that could be used by terrorists.
. My younger cousin is now on ______ diet. She is trying to lose ________weight.
. You must keep ____ in mind _____ your are a student in this school and should obey the school rules.
. A cook will be immediately fired if he is found _____ in the kitchen.
. The traveler couldn’t make himself _____ in his poor English.
. He rushed out of the burning house with the little boy in his arms ____________ the roof fell down and the boy was saved.