根据句意和汉语提示，在空白处填入适当的单词。
Liu Xiang is a very _______________（成功的）runner.
We hope that the little girl can tell us the _______________（真相）.
The presentation will be covered ______________（现场直播）.
Can you _____________（证明）that your answers are right?
Simon likes ______________（闲聊）with his friend on the Internet.