根据句意及提示，写出句中所缺的单词。
1．Do you play an 1.active 2. matches 3. energetic 4. saving 5. operation (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 1.active 2. matches 3. energetic 4. saving 5. operation (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.
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解析：
1．修饰名词使用形容词积极的单词active。
2． 本题的含义为你的白色衬衣与你的黑色裤子相配的很好，主语为单数第三人称，故本题空格处填相配的单数第三人称形式matches。
3． 修饰名词商人businessman应该使用形容词精力充沛的单词energetic。
4． 本题的含义为他喜欢储蓄钱，like doing sth表示喜欢做某事的含义，故本题空格处填saving。
5． 本题的含义为白求恩医生忙于做手术，故本题空格处填名词手术的单词operation。