用人单位应当如实提供哪些资料给职业病诊断机构？安全生产监督管理部门应当监督检查和督促用人单位提供上述资料；劳动者和有关机构也应当提供与职业病诊断、鉴定有关的资料。

A、职业病诊断

B、鉴定所需的劳动者职业史和职业病危害接触

C、工作场所职业病危害因素检测结果

D、职业病诊断、鉴定所需的劳动者职业史和职业病危害接触史、工作场所职业病危害因素检测结果

He devoted most of his time to his research, believing his hard work would___sooner or later.

A．put off

B．take off

C．come off

D．pay off