Air, _ __we breathe every day, is around us all the time.
| A．that | B．/ | C．which | D．it |
Smallpox, a kind of disease, has now died ________.
| A．out | B．away | C．off | D．down |
The discovery of new evidence led to ________.
| A．the thief having caught | B．catch the thief |
| C．the thief being caught | D．the thief to be caught |
—How much farther shall we have to go?
—Another five miles until we reach the mountain _______.
| A．at a distance | B．in a distance | C．at distance | D．in the distance |
On yesterday interview, he didn’t make a(n)_________
at all; what’s the matter with him?
| A．apology | B．appearance | C．difference | D．change |
I think I was at school, ______I was staying with a friend during the vacation when I heard the news.
| A．even so | B．and then | C．so that | D．or else |