One day while shopping in a small town in southern California, it was my misfortune to be approached by a clerk whose personality conflicted with mine. He seemed most unfriendly and not at all concerned about my intended purchase. I bought nothing, and marched angrily out of the store. My hostility toward that clerk increased with each step.
On the outside, standing by the road, was a dark-skinned young man in his early twenties. His expressive brown eyes met and held mine, and in the next instant a beautiful, dazzling smile covered his face. I gave way immediately. The magnetic power of that smile dissolved all bitterness within me, and I found the muscles in my own face happily responding.
“Beautiful day, isn’t it?” I remarked in passing. Then, I turned back. “I really owe you a debt of gratitude,” I said softly. His smile deepened, but he made no attempt to answer. A Mexican woman and two men were standing nearby. The woman stepped forward and eyed me inquiringly. “Sir, but he doesn’t speak English,” she volunteered. “You want I should tell him something?”
At that moment I felt transformed. The young man’s smile had made a big person of me.
“Yes,” my reply was enthusiastic and sincere, “tell him I said ‘Thank you!’ ”
“Thank you?” The woman seeded slightly puzzled. I gave her arm a friendly pat as I turned to leave. “Just tell him that,” I insisted. “He will understand; I am sure!”
Oh, what a smile can do! Although I have never seen that young man, I shall never forget the lesson he taught me that morning. From that day on, I became smile-conscious, and I practice the art diligently, anywhere and everywhere, with everybody.
The author left the store angrily because____.

A．his intended purchases were of poor quality.

B．there’s nothing he wanted in the shop

C．the clerk didn’t speak English

D．the clerk didn’t treat him kindly

The underlined word “hostility” in the first paragraph probably means ____.

A．attitude

B．hatred

C．idea

D．opinion

What does the author mean by saying “I found the muscles in my own face happily responding” in Paragraph 2 ?

A．He did not want to smile.

B．He would thank the young man.

C．He smiled back at the young man.

D．He was happy to meet the young man.

The passage tell us that we should____.

A．help people in trouble

B．smile at others

C．practice smiling every day

D．be generous to strangers

The author asked the woman to say “Thank you!” to the young man because the young man___.

A．taught the author a valuable lesson

B．taught the author how to smile

C．had offered help to the author

D．was a friendly employee of the shop