2道英语按要求改写句子 急求!
问题描述：
2道英语按要求改写句子 急求!
1.A policeman can help make our city a safe place.(保持句意不变）
A policeman can help ________ our city _______.
2.My father has been an engineer for twenty years.（保持句意不变）
My father has ________ ________ an engineer
答
1.keep...safe
2.worked as