-- How long do you think it will be ____ the USA recovers from the losses of the financial crisis? -- Perhaps four or five years.
---Will it be a long time _______ I come for the pictures? ----No. It _______ be ready by 3:00.
Although he _______ the danger to his own health, he found it difficult to quit smoking.
We should _______ whatever is true.
He knows so much about Russia that he's universally acknowledged as a(n) _____ on Russian affairs.
The first few years in the 21st century ______ the rapid rise of China as a world economic power.