Moviegoers know that many special effects are created by computers, ____ they often don't know is that these scenes still require a lot of work.
A.That B.Whom C.What D.How正确答案C
Moviegoers know that many special effects are created by computers, ____ they often don't know is that these scenes still require a lot of work.
A.That B.Whom C.What D.How正确答案C
