---- 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

单位形反复出现有统一感、秩序感，但有时会显得过份单调，这是设计构成的方法中的（）

A.近似构成

B.重复构成

C.渐变构成

D.骨骼构成