1. An au pair is not allowed to take a job in this country, the light household duties which are part of the au pair arrangement are not regarded as employment. A lot of young girls hope to become au pairs sooner or later.
2.The cross of the Niagara Fall was so dangerous that nobody believed they could succeed. At last, both men crossed safely. The crowd sighed with relief---and so did poor Mr. Colord.

An au pair(这个不知道）不被认为是这国家中进行一种工作，au pair安排的部分的轻的家庭职责不被认为是就业。 许多年轻女孩希望迟早成为au双。
2.秋天，尼亚加拉瀑布的十字路口是那样危险的，以至于没有任何人相信他们能取得成功。 终于，两个人安全地横越。 人群感到宽慰地叹息的是他是如此贫穷的Colord先生。