Once from space, the Great Wall is till great in sightA.seeingB.to seeC.seenD.sa

Once ______ from space, the Great Wall is till great in sight

A.seeing

B.to see

C.seen

D.saw

试题答案

C

解析：

考查从句的省略式，主从句的主语一致时，可以省略从句的主语和be动词，once seen="once" the Great Wall is seen，句意是：一旦从太空看，长城看起来还是很伟大。选C。