Throughout the world__________advance has been made in science and technology is due to education which brings forth knowledge, creation and inventions.

______ come into leaf or bloom is obviously a sign of spring. 

— Glen, what’s your opinion?— What surprised us was not what he said but the way ____ he said it.

Is this the reason ____at the meeting for his carelessness in his work?

It hit me _________ my mother could be the proper person to persuade Dad to change his mind．