Since Jack was laid off from his job three months ago, he       a new one, but without luck.

A．looked for

B．bad looked for

C．is looking for

D．has been loking for

危险化学品库房内敷设的配电线路，（）。

A、可以不穿管敷设

B、应穿一般塑料管保护

C、必须穿金属管或难燃塑料管保护

D、没有要求