The Sky Is Blue!
练习内容
My uncle sends me a picture. It's a picture of a blue sky and white clouds.\n"I am so happy to see the blue sky!" says my uncle.\nI wonder why. "Isn't the sky always blue?"\n"No," he says. "The sky in
My uncle sends me a picture. It's a picture of a blue sky and white clouds.\n"I am so happy to see the blue sky!" says my uncle.\nI wonder why. "Isn't the sky always blue?"\n"No," he says. "The sky in