1. One day this tool will come in handy.2. When I took a trip to France, my French ability finally came in handy.
Come in handy請參考例句.
1. 有一天這個工具一定會派上用場.2. 到了法國遊玩時, 我的法文能力總算派上用場了.
It is indeent of him to take money away from his divorced wife.