— How did your students express their thanks to you on Teachers’ Day?— A gift, together with many flowers ____ sent to me by my students.
No sooner _____ back to the kitchen than the doorbell rang.
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.