军队抵达以协助搜索。

The army arrived to ___assist in the search.

你将需要协助编辑为这本书选择插图。

You will be expected to ___assist the editor with the selection of illustrations for the book.

然而，我过去常常协助我的兄弟，他是一名摄影师。

However, I used to ___assist my brother, who is a photographer.