For courage, my fingers cling to the harness (绳套)on my guide dog Cho’s broad back as we pass my neighbor’s fence. Walking by Mr. Smith’s yard is the best part of our morning walk. …and also the worst. The best part is the roses talking to us with the fragrance that bursts bold as firecrackers.
Now comes the worst part—the unfriendly figure nearby that shades us: Mr. Smith. As usual, friendly Cho wags (摇摆) her tail in excitement. But Cho doesn’t know this neighbor does not like me at all. “Hello, Mr. Smith.” I greet him as I do every morning but he never answers me. I know he’s behind his fence. He sounds out of breath, and the creaky gate swings nervously in his hand.
Maybe he’s afraid of me because I am blind. Disabilities scare grown-ups sometimes. Then I remember: Yesterday I heard him playing checkers with my friend Jimmy who’s in a wheelchair. Cho and I march on, and my thoughts keep step. Why does Mr. Smith ignore me? Why can’t two people who like roses like each other? It’s a mystery to me.
Cho and I stop for a moment near the rose bushes while I think. Dad has told me that some folks do not like people from faraway places. Maybe Mr. Smith does not like foreigners. Then, the sidewalk hums beneath my feet. A skateboard zooms by. “Hello, Mai and Cho!” my friend Jana shouts, “Hi, Mr. Smith.”
I wait. Jana is from Mexico. If Mr. Smith ignores Jana, then my mystery is solved. But his voice calls out, “Hello, Jana!” The sound of it twists my heart. Now I know that unfriendly Mr. Smith likes everyone but not me and Cho…
Me and Cho! An idea brightens my mystery. Maybe I do know why Mr. Smith doesn’t talk to me!
“Down!” I command Cho to sit on the ground.
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I lead him back to Cho, and tell Mr. Smith how gentle Cho is.
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同类型试题

y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2


y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2

