1. When surveyors ask U.S. female high-school students what they are going to do when they graduate, they list all kinds of roles they want to fill, like doctors, lawyers, engineers, accountants, civil servants, police and firemen, and fighter pilots.
    当调查人员询问美国女中学生们毕业后打算做什么时，她们列出了各种各样她们所喜欢做的工作，如当医生、律师、工程师、会计、文职官员、警察、消防员以及战斗机驾驶员。

2. This morning, however, a firemen accidentally discovered the cause.
    然而今天上午，一个消防队员偶然发现了起火的原因。

3. At last firemen have put out a big forest fire in California.
    消防员终于扑灭了在加利福尼的一场森林大火。

4. At last firemen have put out a big forest fire in California.
    消防队员们终于扑灭了加利福尼亚的一场森林大火。

5. Yesterday the firemen examined the ground carefully, but were not able to find any broken glass.
    昨天，消防员仔细查看了火灾现场，但没能找到任何碎玻璃，

6. Yesterday the firemen examined the ground carefully, but were not able to find any broken glass.
    昨天，消防队员仔细查看了地面，但未能发现碎玻璃。

7. Firemen had been fighting the forest fire for nearly three weeks before they could get it under control.
    消防队员们同那场森林大火搏斗了将近3个星期才最后把火势控制住。

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