【单选题】听力原文:M: Hello, can you tell me if the library will be open Saturday evening? W: Hold the line please. I'll find out. Q: What does the woman tell the man to do? (18)
【简答题】We have spent a great deal of time and money _________ space, but remain ignorant about vast areas of our own ________ .For we still know little of the world _____________________ the seas. With so mu...