The park was full of people,____themselves in the sunshine.
It is no use fishing for golden fish in this river; there are _____ left.
Writing has _____ much of my spare time, but it has given me a great deal of pleasure.
_____ is no possibility that Bob can win the first prize in the match.
—Have you ever ridden a horse ? —No, but I _____ a camel when I visited Egypt last year.
It took a great deal of courage to admit that all his efforts had been ____.