____ most efficient way to understand thousands of new words is to gain ____ good knowledge of basic word information.
______ money is important, many teenagers say they want to do jobs they enjoy.
Here is a survey about hopes and dreams ______ thousands of students took part.
I felt I was so happy ______ it was the first time that I had gone to the Universal Studio.
I’m afraid we must hurry—the train at six o’clock.
As we know, no matter how a man is, if he doesn’t learn, he knows nothing.