单项选择题

The projected expenses for a new facility can be given only ______ extensive research and necessary calculations are completed.

(A) after
(B) although
(C) for
(D) on condition that
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单项选择题
Customer service representatives must know how to avoid becoming ______ with demanding customers.
(A) arguable
(B) argumentative
(C) argumentatively
(D) argument
单项选择题
Her aptitudes as a secretary are without parallel is our office, so I recommend her without ______.
(A) reservation
(B) description
(C) representation
(D) expectation
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