1. 我们都不知道该怪谁。(be to blame) We don’t know . 2. 我刚才找人把机器修好了。(have sth.done) I just now. 3. 我只有找到了工作才有足够的钱上学。(only if) I get a job enough money to go to school. 4. 昨天那个伟大的科学家做的报告你能听懂吗?(sense) Can you the report the great scientist made yesterday? 5. 每次我去拜访他,他都很忙。(every time引导时间状语从句) a visit to him, he was very busy.
答案:1.who is to blame 2.had the machine repaired 3.Only if; will I have 4.make sense of 5.Every time I paid