根据句意及提示,写出句中所缺的单词。 1.Do you play an _______(积极的) part in the class activities. 2. —Your white blouse _____________(与……相配) your black trousers very well. —Thank you. 3. My uncle is an (精力充沛的) businessman. He always works till midnight. 4. He lives a simple life. He likes _____________(储蓄) money. 5. Dr Bethune was busy performing an __________(手术) on the dying man.