根据句意和汉语提示完成句子，每空一词。
He is one of the __________( 先锋 ) of modern science.
His parents died when he was very young, but love was never           (缺席的) from his childhood.
Red is the colour of ___________(热) and represents power and strong feelings
–I don’t like rock music.    –Me            (也).
The Internet is so widely used now that we can’t ___________ (想象) what life will be like without the Internet.