【正文】
由短文第二段可知。 。 loudly 此處 loud應該改為副詞。 makes 從時間狀語來看,應為一般現(xiàn)在時態(tài)。 ask改為 asking keep后接現(xiàn)在分詞,表示 “一 直(保持)做 ……” 。 one改為 one more code 此處 code應該是單數(shù)。 If someone ask you, “What colour is the sky?”I think you will answer “Blue”.I’m afraid that you will be wrong. The sky has no colour. It looks blue because we are looking at blue sunlight. The sunlight is shining on little bits of dust (灰塵 ) in the air. Is the sky full of air? I’m sure that you have asked this question, too. We know that there is air all around the world, but we couldn’t fly very high because as we go higher, the air gets thinner. If we go far enough away from the earth, we find there is no air. Maybe we can answer some questions now. What is the sky? Where is it? It is all round the world. The sky is space (宇宙空間 ). In space there is nothing, but only the sun, the moon, and all the stars. often think the sky is blue because_____. A. we think it is so B. we like this colour C. we don’t have other colours D. we don’t like other colours sky is ______. A. a star round it B. a big ball with air all C. full of dust D.