While listening to the concert, the audience is required to remain ______ and keep quiet.

“Why was a special meeting called?” “______ a new chairman.”

During the dialogue with Chinese youth in Shanghai, President Obama announced the U.S. would expand the number of students to study in China to 100,000 _______ ties between the two countries.

I would rather________Professor Smith and I would rather you________for him at once. 

— Have you watched Gravity, _______ the best film in 2013?—Yes. It is a survival story _________ in space.