Mary couldn’t make herself ________ attention to because her classmates made so much noise.

A．pay

B．to pay

C．paying

D．paid

下列文件中，（）能够起到为设备监理单位承揽监理业务服务的作用。

A.设备监理大纲

B.设备监理规划

C.设备监理实施细则

D.设备监理合同