根据中文提示，把对话中缺少的内容写在线上。这些句子必须符合英语表达习惯。打句号的地方，用陈述句；打问号的地方，用疑问句。
提示：Peter给Johnson教授打电话请病假，接电话的是教授的助手Sally。
(Peter=P；Sally=S)
P: Hello! This is Peter speaking. 51 , please?
S: I'm sorry. Professor Johnson is not here at the moment. This is his assistant, Sally. 52 ?
P: Yes. Please tell the professor that I'd like to ask for sick leave for tomorrow.
S: Sorry to hear that. May I ask 53 with you?
P: I'm running fever, I've caught a cold.
S: Oh，54 ?
P: No, not very serious, but the doctor told me to stay in bed and have a good rest.
S: I see. I'll 55 as soon as he comes back.
P: Thank you. Goodbye!
S: Bye!
正确答案及解析
正确答案
解析
51.Can/May I speak to Professor Johnson
52.Is there anything I can do for you/Can I help you/Can I take a message
53.what's wrong/the matter
54.is it serious
55.tell him about it/let him know
