Looking out of the window, I saw the leaves        by the wind and whirled into the air.

 Many people ________ the accident, so it was not difficult to investigate（调查）.

I looked carefully at the text and realized that it was____ women who lived in the countryside .

The rise in wood fuel(燃料) use has __________ the disappearance of forest and the loss of habitats for pandas..

When he retells a story , sometimes  he ___________ the key points.