由于劳动生产率的提高，使原有设备的价值相应降低，这种情况属于（）。

A.有形资产损耗

B.有形损耗

C.无形资产损耗

D.无形损耗

---- What did your son say in the letter?

----- He told me that he _____ the Great Wall the next day.

A．will visit

B．has visited

C．is going to visit

D．would visit