单项选择题

Ms. Shirish will resign her position as chief ______officer.

A． operator
B． operational
C． operation
D． operating
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单项选择题
The weather report predicts it will rain ______become colder.
A． neither
B． nor
C． and
D． either
单项选择题
Mr. Doh ______ clients' phone calls.
A． rarely returns
B． returns rarely
C． has returned rarely
D． rarely had returned
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