His father told me that he __________ for the United States three days __________.
You should study the details of the policy before you sign it.
If we keep wasting so much energy, ________are that our oil wells will dry up and the environment will be destroyed.
You may imagine what great difficulty I had ________ complicated ideas in simple English.
The incomes of skilled workers went up. ________,unskilled workers saw their earnings fall.
The further falling of the stock market as reported today has ________ a fresh wave of selling.