单项选择题

It is important to provide an environment ______ people are encouraged to make suggestions at all levels of the company.

A. from which
B. on which
C. in which
D. for which
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单项选择题
They are talking about the people and the place ______ they have visited.
A. that
B. which
C. where
D. what
单项选择题
The proposal ______, we'll have to make another decision about when to start the project.
A. accepted
B. accepting
C. to accept
D. be accepted
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