______ about wild plants that they decided to make a trip to Madagascar for further research
How time flies! It's in two months ________ we'll say goodbye to our high school life.
Hardly ________ to speak ________ someone interrupted him.
Is it that you often play computer games ________ worries your parents?
To live with a high ideal is a successful life. It is not what one does, ________ what one tries to do, that makes a man strong.
David said that it was because of his strong interest in literature ________ he chose the course.