根据法律，他们必须提供合同。

They have to provide a contract ___by ___law.

瑞典的组织和公司依法被迫提出雇用更多女性并改善她们条件的计划。

Swedish organisations and companies are forced ___by ___law to put forward programmes for employing more women and improving their conditions.

根据法律，雇主必须提供安全的工作环境。

Employers are required ___by ___law to provide a safe working environment.