摘要： --What are on October 1? --I am not sure. I make a trip to Shanghai with my friends. A. may B. may be C. will D. must

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---What are you going to do on October 1?
---I am not sure．I ______ make a trip to Shanghai with my friends．

---What are you going to do on October 1?---I am not sure．I ______ make a trip to Shanghai with my friends．