--- Math department, Doctor Webster （76） s____.

--- Hello, Professor Webster, this is Janet Wang calling. I’m living next （77） t ____ your teaching assistant, Ken Williams, Ken asked me to call you （78） b_____ he has lost his voice and can’t talk to you （79） h____.

--- Lost his （80） v____? Oh, what a sham! Is there anything I can do for you?

--- Well, Ken has a class this afternoon from two thirty to four and he won’t be able to （81） t____ it, but he doesn’t want to cancel it either.

--- Want me to try to find somebody else to teach the class?

--- No, not （82） e_____. What he wants to do is to get someone to go in for him, just to pass back the mid-term exam papers. He’s already marked them and they are on the desk in his office. The whole thing wouldn’t （83） t____ more than ten minutes.

--- His class （84） b____ at two thirty, eh? Well, I’m afraid at that time I’ll be on （85） c____ anyway, so I can do it for him.

--- Thank you very much, Professor Webster.

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