So difficult ___________ it to live in an English-speaking country that I determined to learn English well.
—Thank you for giving us a wonderful Chinese dinner, Ms. Wang. —__________________.
He disappeared last month, _______ we have heard nothing of him.
He insisted that he _______ nothing wrong and that he _______ now.
She was so amused with the magician’s tricks that she ________ a smile.
They believe that there is __________ in the world.