单项选择题

It is advisable to look for a professional consulting service when executives are ______ about future market trends.

A．unknown
B．unavailable
C．unable
D．unsure
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单项选择题
The charity has collected more than 10 million dollars this year, which is far ______ its early expectations.
A．beyond
B．back
C．over
D．under
单项选择题
The sales manager s job ______ includes market research, sales planning, assigning tasks to each sales group, and handling customer complaints.
A．applicant
B．description
C．illustration
D．term
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