单项选择题

I had some difficulty in carrying out the plan.

A．making
B．keeping
C．changing
D．implementing
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单项选择题
The workers in that factory manufacture furniture.
A．promote
B．paint
C．produce
D．polish
单项选择题
We all think that Mary's husband is a very boring person,
A．shy
B．stupid
C．dull
D．selfish
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