—He says that my new car is a ____________ of money.—Don’t you think those words are just sour grapes?

She is making herself ill with _____ over her son's future.

— Don’ t be so naughty! Be your _____．— Got it．

At the meeting they discussed three different ______ to the study of maths.

In human, there is a possibility of ____ such as fever and headaches if there is exposure to the virus.