Many years ago, I lived in a building in a large city. The building next door was only a few feet away from mine. There was a woman who lived there, whom I had never met, yet I could see her seated by her window each afternoon.
After several months had gone by, I began to notice that her window was dirty. Everything was unclear through the dirty window. I would say to myself, “I wonder why that woman doesn’t wash her window. It really looks terrible.”
One morning I cleaned my room, including washing the window on the inside.
Late in the afternoon when I finished the cleaning, I sat down by the window with a cup of coffee for a rest. What a surprise! Across the way, the woman sitting by her window was clearly     seen. Her window was clean!
Then it dawned on me. I had been criticizing(批评) her dirty window, but all the time I was watching hers through my own dirty window.
That was quite an important lesson for me. Since then, whenever I wanted to judge(判断) someone, I asked myself first, “Am I looking at him through my own dirty window?” Then I try to clean the window of my own world so that I may see the world about me more clearly.
The writer couldn’t see everything clearly through the window because _______.

A．the woman’s window was dirty	B．his eyes were not good
C．the woman lived nearby	D．his window was dirty

The writer was surprised that _____.

A．the woman was sitting by her window	B．the woman’s window was clean
C．the woman did cleaning in the afternoon	D．the woman’s window was still terrible

“It dawned on me” probably means “_____”.

A．I began to understand it	B．It surprised me
C．I knew it grew light	D．It began to get dark

It was clear that _____.

A．the writer had never met the woman before	B．the writer often washed the window
C．the writer helped the woman clean the window	D．they lived in a small town

From the passage, we can learn _____.

A．one shouldn’t criticize others very often

B．one should often make his windows clean

C．one must judge himself before he judges others

D．one must look at others through his dirty window