19. After discussion, we all think it’s an idea that’s worth _____.
Hearing the news, he rushed out, ______ the book ______ on the table and disappeared into the distance.
Burglar alarms ________ at any time of the day or night serve only to annoy.
— Why do you look so worried? —My computer broke down and my essay ______ unfinished since.
Who will ______ your dog when you all go out for a holiday?
A man with a big camera in his hands stopped me and asked, “Excuse me! Is there a post office around ______ I can have these posters sent to my friends?”