关系代词和关系副词引导定语从句.Relative pronouns and adverbs introduce attributive clauses.请用线画出短文中的名词性从句.Please underline the noun clauses in the passage.使用书上的if从句.Use the if clauses on these pages....
缩成皱纹的,小园齿状的, 它们的航线上, 下, 和穿过犹他州.Corrugated , crenulated, they course up, down, and across Utah.鲸鱼用它们栉齿状的牙齿来捉浮游生物.Whales use their pectinate teeth to gather plankton....
They can't destroy truth without destroying each and every one of us.除非他们将我们赶尽杀绝，否则真理不灭。Frogs eat pests which destroy crops and carry diseases.青蛙吃破坏庄稼、传播疾病的害虫。After the killing, he calmly lit a fire to destroy evide...
This gas mask can immunize you against poison gas.防毒面具能使你免遭毒气袭击.Drinking regularly can improve physical quality and enhance ability to immunize.经常饮用牛奶能提高人的身体素质,增强人体的免疫能力.After testing, this vaccine could be used to immun...