To everyone’s surprise, Tom claimed _______ all his work two days ago.
So difficult ______ it to live in an English-speaking country that I determined to learn English.
For a moment nothing happened. Then ______all shouting together.
—How long are you staying? —I don’t know. ______.
Whatever work you are doing, you should concentrate your attention ______it.
The incomes of skilled workers went up. _____, unskilled workers saw their earnings fall.