【正文】
Yes, I have. (5) So I’m afraid p eople can’t live there. A: Then scientists have to discover some other plas for people to live on. B: Yes, what can we do now? A: We should study hard to improve our environment. B: You’re right. A. I think it’s impossible for the mon people. B. Maybe we have to live on other plas one day. C. But scientists haven’t discovered any life on it. D. What are you doing? E. Have you ever read it before? Ⅲ. 用括號(hào)內(nèi)所給單詞的適當(dāng)形式