18．For years I went to school by bus，so I met many"familiar"strangers．We took the same bus but didn't know each other's names．I used to think it was impossible for us to be true friends．How wrong I was!Smiles from the"nameless"people have changed my thoughts．
The first time on the bus，I saw different faces，we met，greeted and cold faces turned into smiling faces．As days went on，we chatted like old friends．
But I felt it a pity that I was unable to set up the same friendship with a silent girl in the front of the bus．Her old clothing suggested that she didn't have much money，but she always took a cup of water for the driver．I guessed she was a kind girl．But why did she sit in silence instead of talking with us？Why did she never reply to our friendly greetings？Couldn't she smile？
Then，one evening，I got the answer．I walked to the park nearby and found the girl sitting alone under a tree，lonely and sad．I greeted her with the same warm smile that I had shown to her all these months，but this time her face turned red，then a shy smile appeared．As soon as she began her first words，I understood why she hadn't spoken to us before．Talking was hard for her．
I learned her story：Her parents worked hard somewhere．She lived with her disabled grandparents．She said，"I can't express（表達(dá)） myself very well．Most of the time，I can't say what I want to say．I have no friends but…you always smile to me like an angel，so I also want to smile．"That evening，we exchanged our names and we said goodbye like old friends．
Smile is the key to opening the door of heart； it can break the cold walls in front of us．
66．All the following words can describe the girl ExceptC．
A．silent
B．kind
C．proud
D．poor
67．The writer often met the girlA．
A．on the bus
B．in the park
C．a(chǎn)t school
D．under the tree
68．The girl had difficulty inD．
A．listening
B．singing
C．writing
D．talking
69．Which of the following is True？C
A．The girl only talked with the driver．
B．The girl was too shy to talk with others．
C．The writer got to know the name of the girl that evening．
D．The writer can't make friends with those nameless people on the bus now．
70．The main idea of the passage is thatD．
A．we should help those silent people
B．smiles can deal with every difficulty we meet
C．we should smile to the nameless people on the bus
D．smiles can help us get closer and understand each other better．
