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
Can you follow the plot so far
A．change
B．investigate
C．write
D．understand
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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