单项选择题

I found ______ hard to concentrate.

A．this
B．that
C．it
D．what
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单项选择题
I broke my relationship with him because he always found ______ with me.
A．mistake
B．failure
C．error
D．fault
单项选择题
Many of our dreams ______ impossible in the past have come true.
A．were considered
B．to be considered
C．considering
D．considered
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