________unforgettable moment it was to the fans of Leonardo DiCaprio around the world!

_ human beings use it in a wrong way, like we did with nuclear technology, the advancement of science and technology has never led to decline of human development.

The water of the lake was so________that it looked like glass. [ ]

He was very busy yesterday，otherwise he__________to the meeting.

The doctors in Beijing did all they______ to save Shao Zhanwei, mayor of Hangzhou, but he still died of heart attack at the age of 58.