题目

有一种新型锁——声纹锁，只有主人说出事先设定的暗语才能把锁打开，别人即使说出暗语也打不开；这种声纹锁主要是依据声音的         来辨别主人；通常我们听到的声音是靠       传来的． 答案：音色；空气       —The party is so great!—Yes, but Johnson, we’ve got to go home. _______—Thank you. See you later!A．See you.B．I’m very sorry.C．What about you?D．Enjoy yourself!