Question

【题目】Your cousin is said________a new computer programme recently，but do you know when he will finish it?

A．to design

B．to be designing

C．to have been designing

D．to have designed

Answer 1

【答案】C

【解析】考查不定式的用法。句意：你的堂兄最近一直在设计一组电脑程序，你知道他什么时候完成吗？sb.be said to do为固定用法，且设计程序是从过去一直持续到现在的动作，表示“一直……”应该用to have been doing结构。