Say“Cheese” but keep_____ while I take your photograph.

People have always been_______ about exactly how life on earth began.

27. Yang Liwei was picked from the 14 candidates for the Chinese space adventure and became China’s first astronaut _______ his great efforts.

You must obey every word of mine! —________ I don’t?

Mary’s red face suggested that she_______shy, and her friends suggested that she______a deep breath.