\[\boxed{\mathbf{813\ (813)}\mathbf{.}\mathbf{\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
\[A \subset B;\ \ \ \ A \subset C.\]
\[1)\ Может.\]
\[B \subset \text{C\ \ \ \ }\]
\[C \subset B\]
\[2)\ Может.\]
\[B ⊄ C,\ C ⊄ B.\]