The smell of food whetted my appetite.
They will show up whether or not it’s late.
She will study whether or not she has a test.
We will leave whether or not the taxi arrives.
We will continue whether or not it’s difficult.
She will try whether or not she feels confident.
It would be wise to test whether this assumption is correct.
I am wondering whether I should add more questions to the survey.
I would like to know whether mental health services are included in this policy.
I would like to know whether my insurance policy covers the cost of this treatment.
I was wondering whether your findings would be applicable in other contexts as well.