She _______ have left school, for her bike is still there.
The police asked him to _________what he had seen.
The number of people in the party _____fifty, but a number of them ____ absent for different reasons.
He asked us ________ we saw the lost cat or not.
After the exam, my teacher told me that failure ____ the mother of success.
The shop assistant finds it hard to satisfy the girl, for she is too ________ about clothes.