单项选择题

The work in the office was（）by a constant stream of visitors.

A．confused
B．perplexed
C．reversed
D．hampered

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单项选择题
Your improper words will give （） to doubts concerning your true intentions.

A．rise
B．reason
C．suspicion
D．ground
单项选择题
Criticism without suggesting areas of improvement is not（）and should be avoided if possible.（）

A．constructive
B．productive
C．descriptive
D．relative
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