题目内容：
根据下面资料，回答题 提示：Pete，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 a 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' 11 55 as soon as he comes back．
P: Thank you．Goodbye !
S:Bye!
第（51）题答案
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