【单选题】We have finished the project finally . No one can imagine the difficulty we had _____the problem,
【单选题】( ) 的歌剧有《费加罗的婚礼》)《唐 乔瓦尼》《女人心》和《魔笛》,全都作于1786—1791年间 。
【单选题】__we have finished the text, we shall start doing more revision exercises.
【单选题】We have finished the most of our work so far, and the rest _____ on time.
【单选题】我国国防历史给我们的启示表述错误的是()