People working 10 or 11 hours a day are more likely to suffer from heart problems than_____ who go off duty after seven hours.
1 didn’t know ______ they got to know each other.
—There is still a copy of the book in the library.Will you go and borrow _____? —No.I’d rather buy ______ in the bookstore.
Since the forest has been destroyed by a big fire, a large ______ of trees ______ to be planted on the mountain.
Monkeys in the zoo started to show the flu _____ last Monday and altogether twenty have died up to now.
—I’m sorry to keep you waiting for so long.I’ll make short work of my lunch. —____.I’m not in a hurry.