The book was written in 1946,the education system has witnessed great changes.
There is no doubt that I'm trying to do what is best, but ________ I have got to consider the cost.
If the price of oil remains ________ for the rest of 2013, I will consider buying a new car.
Mike did the homework ________ it took me.
With increasing working pressure, Anthony has ________ time to spend with his friends than before.
Though many extra trains and buses are used to carry passengers, traffic tools are still ________ needed during the Spring Festival.