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, sewing(缝纫)or reading.
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 bright morning I decided to clean my flat, including washing the window 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 visible(可见的). 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. How often had I looked at and criticized others through the dirty window of my heart, through my own shortcomings(缺点)? Since then, whenever I wanted to judge(评判)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 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 cheered me up
C．I knew it grew light	D．it began to get dark

It’s clear that_______.

A．the writer had never met the woman before

B．the writer often washed the window

C．they both worked as cleaners

D．they lived in a small town

From the passage, we can learn that______.

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 windows