四、介副词填空( 5% ) 1. The secret _______ happiness is to focus ______ one’s goal. 2. He is junior _______ me in the company, though he is older than me. 3. I’d like to express my appreciation ______ all your help. 4. Don’t waste years chasing other people’s goals. Take the time to decide what you want, and go _____ it wholeheartedly. 5. I stepped out the lab and headed ______ home. 6. It was when Lu Xun was eleven years old that his talent ______ writing became obvious. 7. The children were all cheered ______ looking forward to a trip to the circus. 8. When I look back _____ the school days, I feel much grateful ______ my teachers.