The girl cycled round the corner so quickly that she lost her ____ , fell off and hurt her legs seriously.

Joe just wanted to play a joke on her. He did not mean ______ Sarah.

____ of time and energy have been spent in making the earthquake-stricken areas a permanent museum to remind people how disastrous a natural disaster can be. 

(2014·江苏省三校4月阶段性考试)To their disappointment，Dr Wang gave a speech about the economy without even a passing________to the problem of unemployment.

The teacher asked us to pay attention to the       words.