It ______ be the postman at the door. It’s only six o’clock.
| A．mustn’t | B．can’t | C．won’t | D．needn’t |
1 didn’t know ______ they got to know each other．
| A．where was it | B．where it was |
| C．where was it that | D．where it was that |
—There is still a copy of the book in the library．Will you go and borrow _____?
—No．I’d rather buy ______ in the bookstore．
| A．one; one | B．one; it | C．it; one | D．it; it |
Since the forest has been destroyed by a big fire, a large ______ of trees ______ to be planted on the mountain．
| A．number; has | B．amount; has |
| C．quantity; have | D．sum; have |
Monkeys in the zoo started to show the flu _____ last Monday and altogether twenty have died up to now．
| A．symbol | B．sign | C．signal | D．symptom |
—I’m sorry to keep you waiting for so long．I’ll make short work of my lunch．
—____．I’m not in a hurry．
| A．Take it easy | B．Take your time |
| C．Not at all | D．Don’t be nervous |