It is generally considered that the key ______a foreign language well is nothing but practice.
| A．to learning | B．to learn |
| C．of learning | D．for learning |
—Did you go to the fashion show last week?
—I _____, but I was fully occupied the whole week.
| A．must go | B．must have gone |
| C．would go | D．would have gone |
The house, ______walls are red, is where my grandfather used to live ten years ago.
| A．which | B．of which | C．whose | D．that |
We were scared to death when the fire _____. Fortunately, it was put out before it caused much damage.
| A．broke out | B．came out | C．gave out | D．turned out |
The Diaoyu Islands _____ in Chinese maps since the 14th and 15th centuries.
| A．have been included | B．had been included |
| C．were included | D．are included |
_____ is known to all is that effective measures should be taken to deal with the problem of the over-exploiting of our resources.
| A．What | B．It | C．As | D．Which |