------Have you known each other for long?------ Not very, ________we started to work in the ABC Motor Company.
—I have to be at the office by noon tomorrow. My co-workers are taking me out for a final good-bye lunch. — ________ Where are you going to eat? —I don’t know. They want to treat me.
—How are you getting on with your book?—I have finished a large part of it; the rest of it ________ more difficult.
I’ve got a lot of books, ________ are written in foreign languages.
—May I speak to your manager Mr. Williams at five o’clock tonight?—I’m sorry. He ________ gone to a party long before then.
—When did the story happen?—It happened in ________ spring of ________ 1937.