单项选择题

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

A．confused
B．hampered
C．reverend
D．perplexed
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单项选择题
Your advice would be ______ valuable to him, who is now at a loss as to what to do first.
A．exceedingly
B．excessively
C．extensively
D．exclusively
单项选择题
If you have really been studying English for so long, it's about time you______ able to write letters in English.
A．should be
B．were
C．must be
D．are
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