1. I have no other choice than to call your mother
母を呼ぶほかにない

2. The board had no other choice than to fire the director
役員会は監督を解雇する他なかった。

3. In order to send the report on time, the staff had no other choice than to pay for expedited shipping.
レポートを時間通りに送るためには、職員は速達料金を払う他なかった

4. We have no other choice than to continue on with our project as planned.
計画通りのプロジェクトを続けるほか選択がない。

5. There is no other choice but to turn around and go back to town.
引き返して街に戻る他、選択はない