--Hello,is that Mrs．Black speaking? --Yes,who"s that? --Mary．

单选题

--Hello,is that Mrs．Black speaking? --Yes,whos that? --Mary．

答案解析

问答题

林医生，请他到家里来一趟。格林医生简单询问情况后，答应马上就到。 Mrs. Wilson: Hello, this is Alice. Is Dr. Green there? Dr. Green : Yes, 51 . Mrs. Wilson : Dr. Green, sorry to call you up at this time of the day. But my husband is very sick. I am rather worried. 52 ？ Dr. Green: Yes, certainly. 53 ？ It will help me to decide what to prepare before I come. Mrs. Wilson: Well, I can′ t tell exactly, but 54 . Dr. Green : All right then. Don′ t worry. Keep him in bed. 55 . Mrs. Wilson : I′ 11 do that, Dr. Green. See you soon. Dr. Gr

答案解析

单选题

-Hello, Im Harry Potter.-Hello, my name is Charles Green, but().

答案解析

单选题

----- Hello, This is Sally speaking. May I speak to Mike？

答案解析

多选题

以下关于IS-IS的Hello报文说法正确的有？

答案解析