Mom, the telephone is ringing. I guess either you or Dad           on the phone.

A．is wanted

B．are wanted

C．want

D．wanted

冲击地压的防治措施分为防范措施和解危措施两大类。下列措施，可作为解危措施是 ( )。

A．卸载爆破

B．确定合理开采程序

C．加强顶板控制

D．大断面掘进