In preliminary studies, for example, the questions can show if Prozac is working or not.
In preliminary surveys, the questions can show whether or not Prozac is doing its job.
The questions can show whether or not the donkey is riding the train to work.
Everyone knew that it was a joke.
Humans setting up a tent.
I did not ask if anyone remembered a young lady traveling from London.
The boys are in a real truck.
Three girls playing jump rope outside.
Different to you.