She can speak quite fluent English. She____. A. must have been in the U.S.A. for some time B. must been in the U.S.A. for some time C. should have been in the U.S.A. for some time D. May be in the U.S.A. for some time
【单选题】听力原文:M: That wasn't a bad meal. W: It was very good. It's very nice of you, Dan. Now, I really must go home. M: Oh, it's only 10 o'clock. W: No, really. I must be off. My uncle will come to see me tom...