【题目】He became ______ again and left the office with a smile on his face.
A. happy B. happily C. unhappy D. unhappily
【答案】A
【解析】句意:他又高兴了,脸上带着微笑离开了办公室。become是系动词,后跟形容词;with a smile on his face(脸上带着笑)。根据with a smile on his face可知,他脸上露出的应该是笑容,故选A。