1. "First of all, there´s the rent.
    “首先是房租。

2. Or, they tell the caseworker that the landlord raised the rent by a hundred dollars.
    或告诉社会工作者，说房东又提高了100美元的房租。

3. It is not worth while to rack your brains over such a trifle.
    这样的小事不值得你伤脑筋。