Tom told me that he needed a chair and that soon he found .
The incomes of skilled workers went up. ____, unskilled workers saw their earnings fall.
–Mom, I will send you a gift for your birthday, ____ beyond your imagination.--Oh, dear, thanks.
____ the machine, the engineers paid much attention to the noise from it.
____ the 1990s, the number of antelopes had fallen to about 50,000.
If the machine makes a mistake -- ____ rarely happens -- it gives a warning in the form of a red light.