1.【单选题】
知识点：第二章第二节：句法Moviegoers know that many special effects are created by computers,______they often don' tknow is that these scenes still require a lot of work.
1.【单选题】
知识点：第二章第二节：句法Moviegoers know that many special effects are created by computers,______they often don' tknow is that these scenes still require a lot of work.
