单项选择题

19（）

A．in
B．to
C．under
D．on

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PART ONE·You work in a company which deals with industrial waste. You have read about a new kind of pump which could save your company thousands of dollars in service and maintenance costs. ·Write a memo of 30 40 words to your Head of Department saying: ·where you read about the new pump ·why you think it could be a good investment ·how you might get more information about it. ·Write 40-50 words on a separate sheet.

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