Try to understand the italicized words in the following sentence

Try to understand the italicized words in the following sentencesfrom the context. Write the word(s) in the space given after eachsentence.4. Sophia took a hard look at him; an astounding transformationhad taken place. No longer did he appear lackluster or even middle-aged. His expression sparkled, his clean-shaven face was flooded with color; his eyes now bright, clear and knowledgeable.(transformation)_______
【正确答案】：change
【题目解析】：P126