There are usually at least two _____ of looking at every question.
—Did you go to the fashion show last week? —I _____, but I was fully occupied the whole week.
The house, ______walls are red, is where my grandfather used to live ten years ago.
We were scared to death when the fire _____. Fortunately, it was put out before it caused much damage.
The Diaoyu Islands _____ in Chinese maps since the 14th and 15th centuries.
_____ is known to all is that effective measures should be taken to deal with the problem of the over-exploiting of our resources.