David, it’s you ! I could hardly ______ you just now. You have changed a great deal.
Was it not until you began to work ___ how much time you had wasted?
The city ________ against the terrible possibility of such things happening again.
I’m sorry, but I didn’t mean to be rude to you. Can you______ me?
.—Have you heard the story of “The Merchant of Venice”? —No. When and where does the story ______ ?
.—What’s the matter with the man hanging his head there? —Well, if you _______ know, he was caught stealing my bike.