IV. Replace the underlined words or expressions in the following sentences with phrases or expressions from the text that best keep the original meaning. 1. Although the glow of the sunset was the most intense colure in the scene, the darkening blue of the rest of the sky began increasingly prevail . 2. After graduation, John changed his job frequently but he eventually taught English in a local middle school. 3. We got lost and finally were two hours late. 4. By constantly looking up at the clock he is really saying that he wants us to leave. 5. The schoolboy tried to drive the cow into the stable by tugging ( 拉 ) its tail, but failed. 6. The roots of plants absorb water and make their food out of it.