问题补充:
Wang Hua is said a new computer program recently, but I don’t know when she will finish it.
A. to design
B. to be designing
C. to have been designing
D. to have designed
答案:
A. to design
B. to be designing
(答案→)C. to have been designing
D. to have designed
解析:考查非谓语动词。根据句意及时间状语recently,可知用不定式的完成进行时。句意:据说王华最近正在设计一种新的电脑程序,但我不知道她生命时候完成它。