根据法律，雇主有义务提供一个安全的工作环境。

Under the law, employers ___are ___obliged ___to provide a safe working environment.

签署合同后，您有义务保持房产清洁。

By signing the contract, you ___are ___obliged ___to keep the premises clean.

由于暴风雨，我们不得不取消野餐。

Due to the storm, we ___were ___obliged ___to cancel our picnic.