-I often see him working hard in his spare time.-________he has won the scholarship from time to time.
After a day’s hard work, Mary went to the nearby shop to _____ herself to a strawberry ice cream.
Prices ______ all the time. It's no wonder that we've spent so much money recently.
There’s no way of knowing why one man makes an important discovery ___ another man, also intelligent, fails.
The doctor will see you again next week. _____, you must rest as much as possible.
Of all the books on the shelf,is of any use for improving our practical skills of survival in the competitive world.