against the law

将年幼的孩子独自留在家里是违法的。

It's ___against ___the ___law to leave a young child alone in the house.

玛丽认为她的叔叔参与了违法活动。

Mary thought her uncle was involved in activities ___against ___the ___law.

在澳大利亚许多地方，触摸考拉是违法的。

In many places in Australia, it is ___against ___the ___law to touch koalas.