No one has _____ been able to trace the author of the poem.
Tom, don’t worry. You ___ get the book tomorrow morning.
–I wonder how much you charge for your service. --The first two are free____ the third costs $30.
-What’s wrong with him?--The picture he came across____ his memory of a sad story in his childhood.
You have nothing to___ by refusing to listen to our advice.
–The weather is getting warmer. I hope the children won’t go onto the ice.--I warned them_____.