【单选题】Mike: It’s very difficult to work out the physics problem, Nancy. Nancy; Yes, it may be, Mike. Would you like me to help you? Mike: No, thanks. I’ll try my best to do it. Nancy: OK. I’m sure you can i...
【判断题】Indicate by Yesor No whether the verbs italicized in the sentences below could be properlychanged from simple past to past perfective, or vice versa: 1.I ate my lunch after my wife came back from her ...