【单选题】On the celebration of the university’s 100 th birthday, he said, “I have never experienced __________ time here as a graduate of Tsinghua University.”
【简答题】I don’t doubt _____ he took the first place in his class; but I do doubt _____ he will succeed in the end. [ ] A .if; that B. but; which C. whether; whether D. that; whether